explain xkcd - User contributions [en]

2968: University Age

2024-08-07T08:14:21Z

172.70.91.165: /* Explanation */

{{comic
| number = 2968
| date = August 5, 2024
| title = University Age
| image = university_age_2x.png
| imagesize = 317x388px
| noexpand = true
| titletext = This only makes it more urgent that we adopt my roadmap for the next 10 years, which should put us solidly in the lead.
}}

==Explanation==
{{incomplete|Created by the HR HEAD OF THE OLDEST UNIVERSITY DESTRUCTION DEPARTMENT - Please change this comment when editing this page. Do delete this tag too soon.}}

[[Cueball]] has been the leader of a university for the last five years. In a speech, he declares that his goal during those five years has been to make his university overtake the age of the oldest university in his state, which is obviously impossible.{{Citation needed}} The other university was then two years older than his own (215 years vs 213 years old). He states he has funded an intensive program to make the university five years older, or three years older than the rival university was. That would have happened anyway, whatever he had done short of such gross mismanagement as to cause his university to cease operations, or if he'd done nothing at all.

The final line of Cueball's speech, "Unfortunately, I have terrible news", presumably precedes the announcement that the rival university has also aged 5 years and is therefore just as far ahead as they were before.

Universities often plan ambitious initiatives to boost prestige. However, true success often depends on factors outside administrative control, such as student quality, alumni achievements, faculty research, historical reputation, and external economic and social factors. While administrative efforts are important for operations and gradual improvements, a university's overall prestige cannot be engineered quickly through planning alone.

In the title text, Cueball's proposed "roadmap for the next 10 years" implies either more of the same ineffective efforts, perhaps merging his university with one that was founded before the rival university, possibly undermining the rival university such that it ceases operations, or an even more ambitious and incredibly unlikely plan to place the rival university in a spacecraft on a near-light speed journey, slowing the apparent age of the rival university with relativistic time dilation.

==Transcript==
:[Cueball is standing behind a lectern on a stage. He has raised a finger in the air while addressing an unseen audience.]
:Cueball: When I took the helm five years ago, our university was 213 years old – the second oldest in the state, just behind our 215 year old rival.
:Cueball: Under my leadership, we've funded an intensive program to increase our age to 218, overtaking our rival by 3.
:Cueball: Unfortunately, I have terrible news.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Public speaking]]
[[Category:Time]]

2966: Exam Numbers

2024-07-31T22:49:28Z

172.70.91.165: There are no references, and they wouldn't go there anyway.

{{comic
| number = 2966
| date = July 31, 2024
| title = Exam Numbers
| image = exam_numbers_2x.png
| imagesize = 553x400px
| noexpand = true
| titletext = Calligraphy exam: Write down the number 37, spelled out, nicely.
}}

==Explanation==
{{incomplete|Created by 10 MORE THAN AVERAGE MATH TEACHERS - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

The comic depicts various similarly formatted examination questions that might appear on test papers at various points in a student's potential academic career. While they all share a similar feel, they are asking for different things, some of which might be considered more serious and examinable proofs of study than others.
{| class="wikitable"
|+ Exam numbers
! Exam level !! Question !! Answer
|-
| Kindergarten math || Write down the biggest number you can think of || At a kindergarden-level education, it is assumed that an individual might write down a relatively small number like 300, depending upon whether they have encountered the concept of hundreds. It might also be interpreted as "what's the highest number that you (think you) can count up to". Given the nature of a child's exuberant glee at learning about ''really'' big (but otherwise normal) numbers, they may even try an answer something like "a million billion squillion gazillion". It is not certain what criteria would be used to mark this question correct or otherwise, it may actually by a stealth question in child psychology or a question that everybody 'gets right' so long as they answer it.
|-
| Pre-algebra || Write down the value of x if x=3x-8 || 4
''3x'' refers to the multiplication of 3 and the originally unknown number ''x'', as a convenient shorthand.

By subtracting ''3x'' from both sides, ''-2x = -8''. Divide both sides by -2 to find ''x''=4. Alternately, subtract ''x'' from both sides to give ''0 = 2x - 8'', and as taking 8 from two ''x''s makes it zero, one ''x'' is half that

(Verify by plugging ''x''=4 into the original equation. '''4''' = (3*'''4''') - 8 -> '''4''' = 12 - 8 -> '''4''' = 4.)
|-
| Calculus || Write down the value of ∫_0^π x sin^2 x dx || The integral of the expression is ''(−2x sin(2x)+cos(2x)−2x)/28 + C''. Plugging in values for ''x'' gives the result as π^2/4, or approximately 2.4674.
|-
| PhD Cosmology || Write down the Hubble constant to within 1% || The exact value of the Hubble constant is not known to this level of accuracy; it is about 2.3 * 10^-18 Hz. This is one question that might have a different acceptable answer in the future, depending upon further developments in the understanding of cosmology.
|-
| Game Theory || Write down 10 more than the average of the class's answers || Game Theory studies "games" in which two or more participants' take actions that will succeed or fail based on other participants' decisions. In this case, all students' answers will be averaged, and the best answer will be 10 more than that average. If a student knew what everyone else was thinking, this would incentivise them to answer 10 more than the consensus (taking into account their own forthcoming answer), which would not necessarily be the largest number written down. For instance, if the answers end up being 30, 40, 50, 60, and 70, the most correct of these answers is 60.

In reality, most game theory exams test your understanding of game theory as an academic subject, not your ability to win games. (A type of class where actual results may result in better grades is a business negotiation class where the results of practice negotiations can determine one's grade on the assignment.)

Something similar to this question is found in the title text of [[2385: Final Exam]].
|-
| Postgraduate Math || Write down the biggest number you can think of || This question echoes the very first example, but would be expected to be answered very differently (unlike a revisiting of most of the others).
Postgraduate math students can probably think of ''very'' large numbers. The 'best' answer could be "infinity" since, depending on your definition of the word "number", infinity may be the largest possible number that you will have encountered. This might heavily depend upon the branch of mathematics you are studying, however, as named (finite) numbers or ones with specific and useful notations might satisfy some questioning contexts, whilst the existence of a whole further set of trans-finite numbers (i.e. increasingly large types of "infinity") would be important considerations in others. For those associated with more computational mathematics, any infinity be {{w|NaN|Not a Number}}, and their answer might instead be the ceiling of some binary representation (typically ''2<sup>8n</sup>-1'' for some value of ''n''), the largest value reliably storable in byte form (e.g. a {{w|Integer (computer science)|double quadword}})

As with the kindergarten question, they may be no previously anticipated 'correct' answer. It could be another "correct just so long as you answer it" (or perhaps 'sensibly' so) or the mark goes only to those giving the greatest number across all submissions.
|-
| Calligraphy (title text) || Write down the number 37, spelled out (as "thirty-seven" or "thirty seven"), nicely || Calligraphy, in a nutshell, is the art of fancy writing. The title text expands the joke outside the realm of math and points out that since calligraphy does not require any math skills, the only way a calligraphy exam would even mention numbers is if one had to write them out in such a way as to showcase their calligraphic skill. {{w|37}} is a number that some people believe [http://thirty-seven.org mysteriously appears more often than it should]; this was a subject of a [https://www.youtube.com/watch?v=d6iQrh2TK98 recent Veritasium video].
|}

This final exam question, un-numbered and therefore possibly the ''only'' question upon the whole of each final paper, in some ways (for some instances) echoes the question "What is your name?" that Randall will be aware was the sole question given to Discworld's {{w|List of Discworld characters#Victor Tugelbend|Victor Tugelbend}} in an attempt to ensure he comprehensively passed (or utterly failed) his final student-wizard's exam, after many prior times of deliberately not-quite-passing.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[6 different math test questions.]

:[The first panel:]
:Kindergarten math final exam
:Q. Write down the biggest number you can think of
:A. [empty box]

:[The second panel:]
:Pre-algebra final exam
:Q. Write down the value of x if x=3x-8
:A. [empty box]

:[The third panel:]
:Calculus final exam
:Q. Write down the value of [integral sign, from 0 to pi] x sin^2 x dx
:A. [empty box]

:[The fourth panel:]
:PhD cosmology final exam
:Q. Write down the Hubble constant to within 1%
:A. [empty box]

:[The fifth panel:]
:Game theory final exam
:Q. Write down 10 more than the average of the class's answers
:A. [empty box]

:[The sixth panel:]
:Postgraduate math final exam
:Q. Write down the biggest number you can think of
:A. [empty box]

{{comic discussion}}

[[Category:Math]]
[[Category:Cosmology]]

2921: Eclipse Path Maps

2024-04-23T21:56:07Z

172.70.91.165: /* Explanation */

{{comic
| number = 2921
| date = April 17, 2024
| title = Eclipse Path Maps
| image = eclipse_path_maps_2x.png
| imagesize = 562x674px
| noexpand = true
| titletext = Okay, this eclipse will only be visible from the Arctic in February 2063, when the sun is below the horizon, BUT if we get lucky and a gigantic chasm opens in the Earth in just the right spot...
}}

==Explanation==
{{incomplete|Created by a TORNADO WORLD CHAMPIONSHIP WINNER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
A total {{w|solar eclipse}} occurred {{w|Solar eclipse of April 8, 2024|on April 8, 2024}} in North America, nine days before this comic. This comic comments on the fact that most solar eclipses happen on territories not easily reachable by humans, places with weather conditions that make viewing the eclipse less appealing, like cloudy skies (mentioned previously in [[2915: Eclipse Clouds]] and [[2917: Types of Eclipse Photo]]), fog, or tornadoes (also a [[:Category:Tornadoes|recurring subject]] on xkcd), or areas that experience only a short period of totality.

{| class="wikitable"
|-
! Zone label !! Geography !! Suitability for observation
|-
| Zone where totality lasts 1-2 seconds || Land || No stated issues for visiting, but rendered all too brief an experience for astronomical reasons.
|-
| Bay of shifting ice || Water<br/>(part frozen) || Open water might make this location accessible by boated observers. Solid ice ''might'' grant observers ready access by skidoo, ski and/or skid-plane. Shifting ice causes problems for all these modes of access.
|-
| Shipwreck cove || Water/Coast || The name describes the likely impediment to any boat access.
|-
| Desert so harsh they train Mars astronauts there || Land<br/>(peninsula) || Implied inhospitable, and probably a lack of any normal transport/accommodation infrastructure.
|-
| Sea of rocky crags and maelstroms || Water<br/>(straits) || Yet more risk of nautical hazards, including {{w|Whirlpool|strong rotating currents}}. Possibly a nod to Scylla and Charybdis from The Odyssey.
|-
| [State department travel advisory] || Island || Unknown risk, but probably involves some form of political instability, war, or major health hazard that makes unnecessary visits highly inadvisable. May also be a result of adverse weather effects. Or perhaps all of these at the same time.
|-
| Isle of perpetual fog || Island<br/>(inc. littoral zones?) || Meteorologically unfortunate (ground visibility; ''may'' not fully obscure the skyward view).
|-
| Nice, scenic, accessible area (6 square miles, 40,000,000 visitors expected) || Land || Apparently ideal in all respects. Except for the crowds.<br/>For scale, forty million visitors is slightly more than the total population of California (alternately, somewhere between those of Canada and Poland). Six square miles is about one ''tenth'' the area of Washington DC (similarly around one tenth of Liechtenstein or, if you prefer, less than eight times Monaco).<br/>This would mean up to three people for every square metre, even before accounting for existing population and obstructions, as well as a high probability of {{what if|8|travel congestion}}.
|-
| Tornado capital of the world || Land || Meteorologically unfortunate (frequent disruptive wind vortices, and cloud cover likely).
|-
| Area where the eclipse will be low in the sky, behind the tornadoes || Land || Astronomically disadvantageous, with added complications from the neighbouring weather system.
|}

The title text mentions the {{w|Solar eclipse of February 28, 2063|solar eclipse of February 2063}}, and claims it will only be visible from the Arctic, though in fact this annular eclipse will traverse through the Indian Ocean. The eclipse in the comic would supposedly happen when the {{w|Sun}} would be below the horizon, which is a contradiction in terms, since an eclipse is only an eclipse from the standpoint of the viewer — it is equivalent to saying that the eclipse is not visible from that location, but is visible from a location over the horizon, at a point that is at the other end of a direct straight line {{w|Chord (geometry)|through the Earth}} that is directed 'down' towards the unrisen Sun and Moon. It then jokingly suggests that a giant chasm could open up between the location being considered and the location from where it would be visible, allowing people to view it. If this did happen, the chasm itself would likely eclipse the eclipse as a spectacle. In most cases, it would also likely cause severely detrimental effects (for example, magma eruptions, tsunamis, etc.), and would therefore not be considered 'lucky' by most people, despite the small and short-term benefit of being able to view an eclipse from a previously unsuitable location.

Note: The {{w|Novaya Zemlya effect}} can make it possible to observe a solar eclipse when the Sun is below the horizon at the poles during certain weather conditions. Also called a "polar mirage", the effect is when an atmospheric inversion ducts sunlight along the surface of the Earth for distances up to 250 miles (400 km), which would make the Sun appear 5° higher in the sky than it actually is. This appears to be the rare situation where [[Randall]] was unaware of an obscure scientific phenomenon that would contribute to a joke.

===Possible references to actual eclipses===
* Despite the {{w|solar eclipse of April 8, 2024}} passing through many populated areas of the United States, many weather forecasts a few days before were pessimistic, predicting significant clouds, and even thunderstorms, along a large majority of the eclipse path. An example of one such archived forecast map is [https://web.archive.org/web/20240423203358/https://cms.accuweather.com/wp-content/uploads/2024/04/Screenshot-2024-04-05-at-12.42.58-PM.png here]. Only the very northeast bit of the path had consistently good forecasts, leading to news [https://www.boston.com/news/environment/2024/04/09/many-eclipse-visitors-to-northern-new-england-pulled-an-all-nighter-trying-to-leave/ reports] of an all-nighter of traffic jams, which the comic may be alluding to.
* The {{w|solar eclipse of August 12, 2026}} starts in Siberia, almost touches the North Pole, then touches Greenland, (barely) Iceland, and finally sets in Spain around 8:30pm local. In the relevant part of Siberia, the local time will be very close to midnight and the Sun will still be below the horizon for some. (The Sun will rise around midnight, just before/during/after totality depending on location, and then set after 10pm local.) In Spain, the length of totality will be significantly shortened due to the shallow angle at which the Sun (and therefore the Moon's shadow) hits the Earth. Notably, this is the next upcoming total solar eclipse as of this comic's publish date.
* The {{w|solar eclipse of August 2, 2027}} touches the southern edge of Spain and Gibraltar, then proceeds to go through numerous areas known for their political instability.
* The {{w|solar eclipse of November 14, 2031}} takes place entirely over the Pacific Ocean.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:'''Every eclipse path map'''
:[A grey band representing the totality path of an eclipse travels along the map across several labels. Labels along the path from top to bottom:]
:[On land] Zone where totality lasts 1-2 seconds
:[On water] Bay of shifting ice
:[On water] Shipwreck cove
:[On land] Desert so harsh they train Mars astronauts there
:[On water] Sea of rocky crags and maelstroms
:[On a big island; label in square brackets] State department travel advisory
:[On a small island] Isle of perpetual fog
:[On small part of a peninsula] Nice, scenic, accessible area (6 square miles, 40,000,000 visitors expected)
:[On land] Tornado capital of the world
:[On land] Area where the eclipse will be low in the sky, behind the tornadoes

{{comic discussion}}

[[Category:Solar eclipses]]
[[Category:Maps]]
[[Category:Tornadoes]]
[[Category:Weather]]

Category:Furries

2024-03-06T17:36:51Z

172.70.91.165:

{{w|Furry Fandom|Furries}} are fans of fictional anthropomorphic animals, or a direct description of those characters that they particularly admire. The fans may express their interests by wearing ears and tails, sometimes even constructing elaborate full-body fursuits that embody their {{w|fursona}}. They often are accused of sexual perversion, despite all evidence to the contrary. Randall's full opinion on furries is currently unknown, but he has never mentioned or depicted them in an unsympathetic manner. [[Cueball]] does refer to the furry fandom as a fetish in [[471: Aversion Fads]], but this was a common opinion in 2008, when that comic was posted.

[[Category:Comics by topic]]
[[Category:Animals]] 
[[Category:Fiction]]

1037: Umwelt

2024-03-02T19:07:23Z

172.70.91.165: /* Galaxies */

{{comic
| number = 1037
| date = April 1, 2012
| title = Umwelt
| image = umwelt_the_void.jpg
| titletext = Umwelt is the idea that because their senses pick up on different things, different animals in the same ecosystem actually live in very different worlds. Everything about you shapes the world you inhabit--from your ideology to your glasses prescription to your web browser.}}
{{TOC}}
*To view your personal version of the comic, visit the {{xkcd|1037|original comic}}.

==Explanation==
This was the third [[:Category:April fools' comics|April fools' comic]] released by [[Randall]]. The previous fools comic was [[880: Headache]] from Friday April 1st 2011. The next was [[1193: Externalities]] released on Monday April 1st 2013.

An {{w|Umwelt}}, as the title text explains, is the idea that one's entire way of thinking is dependent on their surroundings. Thus, this {{w|April Fools}} comic changes based on the browser, location, or referrer. Thus, what the viewer is viewing the comic on, where they live, or where they came from determines which comic they actually see. As a result, there are actually multiple comics that went up on April Fools' Day, although only one is seen.
(The term 'Umwelt,' as mentioned in the comic, refers to the semiotic theories of Jakob von Uexküll and Thomas A. Sebeok)

Information about how the wide variety of data was collected and credit for the viewers who contributed can be found [https://www.reddit.com/r/xkcd/comments/rnst4/april_fools_xkcd_changing_comic/ here].

===The Void===
[[File:umwelt the void.jpg]]

If the device or browser you are using does not support Javascript, you will simply see a static image of a white swirl on a dark background.

Possible reference to The Ring (https://imgur.com/wlGmm), as though to suggest that using an alternative browser is dismal and horrific.

Davean (xkcd's sysadmin): "[This] comic isn't available everywhere and it can come up i[n] some situation[s] only for recognized browsers."

Browser: Alternative Browser

===Aurora===
[[File:umwelt aurora.png|800px]]

One could interpret that since Megan didn't go out and therefore missed seeing the {{w|Aurora}} (northern lights), Cueball in his [[1350:_Lorenz#Knit_Cap_Girl|knit cap]] lied about it. That way, she wouldn't have felt sad that she missed out. Another interpretation could be that he decides that since she did not even bother to go outside to see such a spectacular sight he will not tell her about it. And yet another could be that he did not think it was interesting.

Cueball could possibly also be red-green colorblind, seeing the green aurorae as grey "clouds". This would serve as an example for the theme of the comic, as a non-colorblind person and a colorblind person seeing the same color would perceive it differently, one seeing it as its true color, and the other seeing it without the shade of color they cannot see. If this is the case, then it would be a reference to umwelt, as Cueball would be living in a world where the auroras do not reach his location.

In real life, [https://www.huffpost.com/entry/the-northern-lights-dont-look-anything-like-they-do-in-photos_n_5500a4d9e4b0e62d0dd4f9bb aurorae are usually seen as grey/white clouds] to the naked eye, as our eyes cannot perceive the "greener" colors as well in the dark.

This image changed based on the size of the browser window including different panels at different sizes.

Locations: Canada, Boston, Indiana, Maine, New York, Ohio, Oregon, Texas, Minnesota, Norway, Denmark, France, Ireland, Rhode Island, Mississippi, Seoul (Safari), London (on Firefox). Also in Virginia, but using Ohio in the first panel; in Maryland, but using Canada in the first panel; in Marion, Illinois, but using Canada in the first panel along with the phrase "as far south as us" in the first panel, and in Utah, also using the phrase "as far south as us", same with Colombia, Spain and Georgia.

In [[1302: Year in Review]] a possibly different Megan has a completely different approach to the chance of seeing northern lights, as that was the only event she was looking forward to in 2013, and it failed. If this is the same Megan, perhaps she learned that there actually were northern lights in her area from another source, and so desperately wanted to have another chance to see them.

===Snake===
[[File:umwelt snake composite 1024.png]]
[[:File:umwelt snake composite.png|Full size]]

The joke here is the extreme length of snakes. The world's longest living snake is the {{w|reticulated python}}, the longest ever measuring over 22 feet (6.95 meters). The blue and orange circles refer to the hit game {{w|Portal}}.
There is also a reference to the book "The Little Prince" in the second panel, where there is a large bulge in the snake that looks like an elephant. The Little Prince starts out by mentioning a drawing that the author made when he was six that showed an elephant inside a snake.

Also, the number and content of the panels changes depending on the size of your browser window.

This image changed based on the size of the browser window including different panels at different sizes.

Specific AltText for this image: Umwelt is the idea that because their senses pick up on different things, different animals in the same ecosystem actually live in very different worlds. Everything about you shapes the world you inhabit -from your ideology to your glasses prescription to your browser window size.

Location: Texas (on Chrome Version 33.0.1750.154 m), New Jersey, California (on Chrome Version 39.0.2171.95), Maryland, Massachusetts (Safari for iOS, Chrome version 49.0.2623.112), Connecticut (Safari for iOS, Chrome Version 73.0.3683.103, Internet Explorer, and Microsoft Edge), Virginia (on Chrome), Michigan (Firefox v46.0.1), Penang (Chrome Version 65.0.3325.162), London (Microsoft Edge), Germany (on Opera One (version: 106.0.4998.70)).

===Black Hat===
[[File:umwelt tortoise 1024.png]]
[[:File:umwelt tortoise.png|Full size]]

Cueball as an analyst attempts to psychoanalyze [[Black Hat|Black Hat's]] [[72: Classhole|classhole]] tendencies. Cueball's quote and the whole setup is a direct reference to the movie {{w|Blade Runner}} (1982) and Black Hat is taking the Voight-Kampff test which is used to identify replicants from real humans.

Black Hat's reason for not helping the tortoise is that ''it '''knows''' what it did'' and thus in Black Hat's world view it deserves being turned over. The final part of the joke is that when zooming out it turns out that there is a tortoise behind Black Hat and he has actually already turned it over for what it did.

Location: Seems to appear mostly in "other countries" — those without location-specific comics.

===Too Quiet===
[[File:umwelt too quiet 1024.png]]
[[:File:umwelt too quiet.png|Full size]]

A reference to {{w|Jurassic Park (film)|Jurassic Park}} which has been [[87: Velociraptors|constantly]] [[135: Substitute|referred]] [[1110: Click and Drag|to]] [[155: Search History|before]] [[758: Raptor Fences|in]] this comic.

Also referencing the film {{w|2 Fast 2 Furious|2 Fast 2 Furious}}, an entertaining, yet intellectually unprovoking sequel in a popular film franchise, which is aimed at teenagers and young adults, prompting the blunt response from the stickman. The fact that Steve would use such a cliché {{w|2000s (decade)|noughties}} movie term in such an intense moment, and the subsequent curse, is the joke in this comic.

Location: short version — iPhone 5c Safari browser in Texas, iPhone 5 Chrome Browser in Minnesota, long version - Google Chrome browser in Indiana, Windows 8 Laptop

===Pond===
[[File:umwelt pond mobile.png]][[File:umwelt pond wide.png]]

Two different versions showed, the narrower version for mobile devices.

Location: The Netherlands and various other countries.

===Galaxies===
[[File:umwelt galaxies 1024.jpg]]
[[:File:umwelt galaxies.jpg|Full size]]

Megan is distracted from her conversation with [[Cueball]] by realizing that the space behind his head, from her vantage point, contains millions of galaxies. This is similar to an [https://nssdc.gsfc.nasa.gov/image/astro/hst_deep_field.jpg incredible photograph] taken by the Hubble Telescope, in which a tiny dark area of space in fact contained numerous galaxies.

The title text is an imaginative leap from this scenario: that the galaxies would be up to no good once Cueball is turned away from them. This is presumably a reference to [https://www.mariowiki.com/boo Boo], an enemy from certain Mario games who moves toward Mario only when Mario is facing away from Boo.

This comic was only reported once... the intended environmental context is a mystery.

Location: Sagittarius A*

===xkcd Gold===
[[File:umwelt xkcd gold.png]]

This is probably a reference to the 4chan Gold Account, an implementation on 4chan that does not actually exist, and is usually used to trick newcomers into revealing their credit card numbers. The joke is that "Gold Account" users can supposedly block other users from viewing images they have posted. The fifth panel is probably a reference to Beecock, a notorious set of shocker images. 4chan's moderators have been known to give out "beecock bans" or "/z/ bans" to particularly annoying users, which redirect the user to a page containing beecock and the text "OH NO THE BOARD IS GONE".

Referrer: 4chan

===Yo Mama===
[[File:umwelt dog ballast.png]]

Possible reference to Kurt Vonnegut Jr.'s "{{w|Harrison Bergeron}}."

The joke is that people's different experiences shape how they perceive the world in that the people who live in this world would perceive the joke as funny, while people in our world would not get it. This is the idea of umwelt mentioned at the top of the context where different individuals perceive the world differently.

Refer: Facebook

===Reddit===
[[File:umwelt reddit.png]]

Reference to referencing, because Reddit, as a referring site, likes references to its referencing in its references.

This comic also features recursive imagery similar to [[688: Self-Description]] where the second panel embeds the entire comic within itself. (Except, conspicuously, the arrow indicating that it is "You" in the first panel.)

One of the browser tabs visible in the center panel is {{w|Elk}} on Wikipedia.

Referrer: Reddit

===Buns and Hot dogs===
[[File:umwelt somethingawful.jpg]]

This is a reference to the question "Why do hot dogs come in packages of 6 while buns come in packages of 8?"

Another, more sexual reference to this question can be found in [[1641: Hot Dogs]].

Referrer: SomethingAwful, Questionable Content, & MetaFilter

===Twitter===
[[File:umwelt twitter.jpg]]

A summary of the "content" typically found on Twitter.

In the tweet feed, there are three tweets about some podcast on the top, followed by the tweet containing link they clicked on to get to the comic, tweets about Rob Delaney, unspecified passive-aggressive tweets, and a tweet from {{w|Horse_ebooks}} retweeted by one of the users the reader follows.

On the left, the topmost dialog, with profile information, shows that the user has posted 1,302 tweets, but only follows 171 people and has even fewer followers, at a measly 48. This is marked with a sad face, implying that the user wants more followers.

Below that is the "who to follow" dialog, which is written up as consisting of "assholes".

Below that is the "trending tags" dialog for the United States. It is full of tags about word games, tags about misogyny, and tags about Justin Bieber.

Below that is an unidentified dialog full of "stuff your eyes automatically ignore". And finally, on the bottom is the background color, which is "a really pleasant blue".

Referrer: Twitter

===Wikipedia===
[[File:umwelt wikipedia wide.jpg]]
[[File:umwelt wikipedia mobile.png]]

The term {{w|Mile High Club}} (or MHC) is a slang term applied collectively to individuals who have had sexual intercourse while on board an aircraft. Randall says that reading the news articles on it has distracted him from making that comic.

Two different versions shown, the narrower version (the single panel with all the text) for mobile devices.

Referrer: Wikipedia

===Google Chrome===
[[File:umwelt chrome1.jpg]]

{{w|Sergey Brin}} (born August 21, 1973) is an American computer scientist and Internet entrepreneur who, with Larry Page, co-founded Google, one of the most profitable Internet companies. As of 2013, his personal wealth was estimated to be $24.4 billion. Randall makes the joke that as the founder of Google, Brin's permission would be needed to use Google Chrome. Because there are millions of people who use Google, it is likely that at least some of the time Brin would be asleep, thus he would need to be woken.

Browser: Chrome

===Chrome/Firefox===
[[File:umwelt chrome2.png]]

Mozilla {{w|Firefox}} is a free and open-source web browser developed for Windows, OS X, and Linux, with a mobile version for Android and iOS, by the Mozilla Foundation and its subsidiary, the Mozilla Corporation. Cueball is complaining about {{w|Google Chrome}}, to which [[Ponytail]] replies that there is an {{w|add-on}} that fixes what he is complaining about. When questioned, she replies that the add-on is Firefox, which isn't an add-on at all and is instead a different browser.

Browser: Chrome

===Google Chrome-2===
[[File:umwelt chrome3.png]]

This panel references Google Chrome's error screen, which shows a puzzle piece. The comic humorously implies that Chrome is looking for that piece. When completing jigsaw puzzles, a common strategy is to figure out where the pieces must be from their geometry rather than from the picture they create. In this case, the text suggests that Chrome believes the puzzle piece connects to the pieces which form one of the corners of the puzzle, which may seem impossible because any piece that links up to a corner would usually have at least one flat edge, which this piece has none. However, more complicated puzzles have complex shapes and are not always simply approximate squares with tabs and blanks.

Browser: Chrome or silk on desktop view

===Mozilla Firefox Private Browsing===
[[File:umwelt firefox incognito.png]]

Another reference to crashing web browsers.
Firefox shows the history when it crashes.
Browser: Firefox (Incognito only?)

===Internet Explorer===
[[File:umwelt ie.png]]

Yet another reference to crashing web browsers

Browser: Internet Explorer

===Maxthon===
[[File:umwelt maxthon.png]]

Browser: Maxthon

===Netscape Navigator===
[[File:umwelt netscape womanoctopus.png]]

[[File:umwelt netscape man.png]]

{{w|Netscape Navigator}} was a web browser popular in the 1990s.

Browser: Netscape

===Rockmelt===
[[File:umwelt rockmelt.png]]

{{w|Rockmelt}} is a social-media-based browser.

Reference to the gospel song {{w|Longing for Old Virginia: Their Complete Victor Recordings (1934)|"There's no hiding place down here" by The Carter Family}}, later covered by Stephen Stills.

:I run to the rock just to hide my face
:And the rocks cried out, no hiding place
:There's no hiding place down here

It may additionally be a reference to the ''Babylon 5'' episode "And the Rock Cried Out, No Hiding Place," which featured the song.

Browser: Rockmelt

===Plugin Disabled===
[[File:umwelt plugin disabled.png]]

When the Google Chrome web browser does not have the required software (called a plug-in) to display a web page's content, it displays a puzzle piece icon and an error message. In this case, Chrome informs the user that the content is impossible to display.

Browser: Plugin (?) Disabled, Safari Desktop

===Corporate Networks===
[[File:umwelt corporate general.png]]
[[File:umwelt corporate amazon chrome.png]]
[[File:umwelt corporate amazon firefox.png]]
[[File:umwelt corporate amazon other.png]]
[[File:umwelt corporate google chrome.png]]
[[File:umwelt corporate microsoft chrome.png]]
[[File:umwelt corporate microsoft firefox.png]]
[[File:umwelt corporate microsoft other.png]]
[[File:umwelt corporate nytimes chrome.png]]
[[File:umwelt corporate nytimes other.png]]

These error messages appear if the user is on a network owned by one of the corporations noted. The error message includes a warning against speaking on the company's behalf.

ISP: Corporate networks of Amazon, Google, Microsoft, NY Times

===Military===
[[File:umwelt military.png]]

[[Cueball]] assumes that anyone using a military network has an important job like watching for incoming missiles. He includes a thank-you to the user for their military service.

ISP: Military networks

===T-Mobile===
[[File:umwelt tmobile.png]]

Reference to T-Mobile's distinguishing feature (at the time it was written) of weaker coverage, in relation to other major providers.

ISP: T-Mobile

===Verizon and AT&T===
[[File:umwelt verizon.png]]

[[File:umwelt att.png]]

Reference to Verizon and AT&T's scandals/controversy regarding implementation of bandwidth caps.

ISP: Verizon and AT&T

===France===
[[File:umwelt france.jpg]]

A common joke about France is that the nation does not win wars. This originated from France's annexation by Germany during World War II, and America's late entry into the war, which is sometimes portrayed humorously as a case of America 'saving' Europe, in this joke particularly France (the role of the French resistance is usually not mentioned), leading to a common American joke at the expense of France's military prowess [https://www.albinoblacksheep.com/text/victories.html][https://politicalhumor.about.com/library/images/blpic-frenchmilitaryvictories.htm][https://politicalhumor.about.com/library/jokes/bljokefrenchmilitaryhistory.htm]. When France did not form part of the coalition that invaded Iraq in 2003, aligning with the many countries that condemned U.S. action, the joke was revived.

A Google search of "French Military Victories" + 'I'm feeling lucky' used to direct to "did you mean: french military defeats" (due to a {{w|Google bomb}}). Cueball is trying to show this to his friend, who is French. However, his joke backfires, as his friend immediately points out that the stereotype of France not having military victories is undercut by the fact that one of the most innovative military commanders in history, Napoleon, was French by citizenship (though Italian/Corsican by culture, as the French annexed Corsica a few months before his birth to an Italian noble family), and in fact conquered much of Europe.

Following the theme of umwelt, the comic highlights the two characters' differing perspectives: The American thinks that France is a military failure, while the Frenchman thinks of Napoleon.

The last line of the comic further implies that Cueball is not as smart as he thinks he is in regards to anything French, as he mispronounces the French loan word "{{w|Touché (fencing)|touché}}".

Locations: France & Quebec

===Germany===
[[File:umwelt germany.png]]

This comic references the {{w|Berlin airlift#The start of the Berlin Airlift|Berlin Airlift}}, a relief measure for citizens in West Berlin (surrounded by East Germany) instituted by the Western Allies after World War II. In reality, the Western Allies flew a grand total of 500,000 tons of food over the Soviet blockade in planes. Randall puts a twist on this event by making it more fun: dropping supplies from a grand chairlift. The play on words is that "chairlift" rhymes with "airlift" and thus makes an easy substitution. The chair force is also a name that other service branches use to make fun of the air force.

Location: Germany

===Israel===
[[File:umwelt israel.png]]

Translation: Mom, I met a great guy! But he's not Jewish. ...Wait, what do you mean "neither are we"? I'm completely confused.

A reference to the multiple use of the word Jewish to denote both a {{w|Judaism|religious group}} and a {{w|Jews|nationality/ethnicity}}, as well as the stereotype of Jews holding low opinions of interfaith marriage.

A side note: Randall accidentally drew an apostrophe instead of the similar-looking Hebrew letter י everywhere that letter should appear.

Location: Israel

===Carnot Cycle===
[[File:umwelt japan.png]]

A pun on "cycle"; a "{{w|Carnot cycle}}" is a thermodynamic cycle (e.g. refrigeration). Its efficiency depends on the temperature of the hot and cold 'reservoirs' in which it is operating. The icon on the side of the motorcycle resembles a [https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Carnot_cycle_p-V_diagram.svg/1000px-Carnot_cycle_p-V_diagram.svg.png graph of the Carnot cycle.]

Location: Japan

===UK===
[[File:umwelt uk.jpg]]

He worded this as though to imply that the UK is a state of the U.S., and an unimportant one at that, which pokes fun at the UK, creating a paradox (sort of).

Location: UK

===Blizzard===
[[File:umwelt disasters blizzard.png]]

This comic is aimed at the debate over whether earthquakes or blizzards are harsher conditions to live under. In keeping with the theme of umwelt, the comic demonstrates that the two people perceive the world in two different ways due to their different experiences: The Californian perceives a mild earthquake and a severe blizzard, while the Northeasterner perceives a severe earthquake and a mild blizzard.

For each location this displayed in, the state name was substituted in the third panel.

Locations: Alabama, Boston, Chicago, Dallas, Georgia, Halifax, Illinois, Michigan, Minnesota, Missouri, the Northeast, Ohio, Oklahoma, Ottawa, Pennsylvania, Philadelphia, Texas, Toronto, Tennessee, New York, Wisconsin

===Tornado===
[[File:umwelt disasters tornado.png]]

This comic is aimed at the debate over whether earthquakes or tornadoes are harsher conditions to live under. In keeping with the theme of umwelt, the comic demonstrates that the two people perceive the world in two different ways due to their different experiences: The California perceives a mild earthquake and a severe tornado, while the Midwesterner perceives a severe earthquake and a mild tornado. It's similar to [[#Blizzard|Blizzard]].

For each location this displayed in the state name was substituted in the third panel.

Locations: Alabama, Dallas, Illinois, Georgia, The Midwest, Missouri, Ohio, Oklahoma, Ottawa, Tennessee, Texas (and Virginia, but it used Ohio in the third panel)

Tornadoes are a [[:Category:Tornadoes|recurring subject]] on xkcd. The picture used in [[1754: Tornado Safety Tips]] very reminiscent of the one from this version of Umwelt. [[Category:Tornadoes]]

===Hurricane===
[[File:umwelt disasters hurricane.png]]

This comic is aimed at the debate over whether earthquakes or hurricanes are harsher conditions to live under. In keeping with the theme of umwelt, the comic demonstrates that the two people perceive the world in two different ways due to their different experiences: The Californian perceives a mild earthquake and a severe hurricane, while the Easterner perceives a severe earthquake and a mild hurricane. It's similar to [[#Blizzard|Blizzard]] and [[#Tornado|Tornado]].

For each location this displayed in the state name was substituted in the third panel.

Locations: D.C, Florida, Georgia, Houston, Miami, New Jersey, North Carolina, South Carolina, Virginia

===Lake Diver Killer===
[[File:umwelt lake diver.png]]

This comic shows a news reporter standing in front of a lake. She is reporting on a serial killer who targets divers. As more divers are sent in to investigate and/or search for bodies, more divers go missing, the implication being that they were also murdered. The more likely reason is the lake itself is dangerous for diving, and the divers probably drowned from natural hazards (undercurrents, entanglement, running out of oxygen in tanks, etc.) instead of a malicious assailant. Also, this is a sort of loop, where each time a diver gets killed, the investigative team goes and investigates, causing more divers to get killed, causing more deaths, and so on.

Location: Bay Areas, Metro Detroit, Vermont showed an image specifically referencing Lake Champlain

===Lincoln Memorial===
[[File:umwelt lincoln memorial.png]]

{{w|Abraham Lincoln}}, the 16th president of the United States of America, was not an entity composed wholly of nanobots that attempted to consume the entire nation to then be imprisoned within the {{w|Lincoln Memorial}}.{{Citation needed}} The inscription references the epitaph at the actual Lincoln Memorial, which reads "In this temple, as in the hearts of the people for whom he saved the union, the memory of Abraham Lincoln is enshrined forever".

Locations: Illinois & Washington, D.C.

===Helicopter Hunting===
[[File:umwelt helicoptor.png]]

In Alaska, governments and individuals have {{w|Wolf hunting#North America 2|shot wolves en masse from helicopters}} in an attempt to artificially inflate populations of game, such as moose and caribou, to make hunting them easier. This is opposed by many, as the game populations are not endangered (thus, this threatens ecological balance); wolves are a small threat to livestock in North America; most of the wolf body —including meat and bones— goes wasted as they are sought mainly for their pelts.

Location: Alaska

===Newspaper===
[[File:umwelt life scientists.png]][[File:umwelt life rit.png]][[File:umwelt life umass.png]]

Creating new life has long been a well understood process, in a lab or otherwise.

This comic is likely a reference to the title text of [[983: Privacy]]

Location: Various

Specific versions appeared for RIT and UMass Amherst

===Robot Paul Revere===
[[File:umwelt paul revere.png]]

Combination of the legend of {{w|Paul Revere#"Midnight Ride"|Paul Revere}} and a computer bit that differentiates between two situations by indicating a zero or a one.

Location: Boston

===Counting Cards===

All four colleges in this series are in Massachusetts and, being similar, in pairs, rival each other to some extent (Harvard-MIT, and Smith-Wellesley). The comic contains a reference to the {{w|MIT Blackjack Team}}, which entered popular culture via the {{w|21 (2008 film)|film 21}}, and a possible reference to Orwell's book '1984' and/or {{w|Chain of Command (Star Trek: The Next Generation)|popular homage to it via Star Trek}}: "There are four lights."[https://www.youtube.com/watch?v=ChYIm6MW39k]

Bonus: The thought-gears in panel 3 are spinning against each other.

Location: Harvard

[[File:umwelt counting cards harvard.png]]

Location: MIT

[[File:umwelt counting cards mit.png]]

"Course 15s" at MIT are the business major students, often mocked for taking a less-rigorous program. The different interpretation for why the MIT students could not count cards compared to Harvard may be a reference to the theme of umwelt.

Location: Smith

[[File:umwelt counting cards smith.png]]

Location: Wellesley

[[File:umwelt counting cards wellesley.png]]

Both Wellesley and Smith are all-women colleges in Massachusetts.

===Giant Box Trap===
[[File:umwelt box trap.png]]

Randall got his undergrad in Physics at the {{w|Christopher Newport University}}, and was scheduled to return shortly to give a talk. The "Trible" figure on the right is Paul Trible, the then-president of CNU. This comic depicts a classic trap, where an upside-down box is propped up with a stick. When the stick is removed, by pulling a string, the box falls and traps whatever is underneath it. Aside from the joke of the obvious trap, there's also the fact that the president would not be responsible for revoking unearned diplomas.

Location: Christopher Newport University

===Chemo Support===
[[File:umwelt chemo.jpg]]

[[Cueball]] has shaved his head in support of people going through {{w|chemotherapy}} but, as he is always depicted as a stick figure with no hair, no one can tell.

Randall's now-wife was diagnosed with breast cancer, and apparently DFCI is where they've been spending much of their time.

Location: Dana-Farber Cancer Institute

===Reviews===
[[File:reviews.png]]

The previous strip appears twice when using [[wikipedia:Tor (anonymity network)|Tor]].

Browser: Any using Tor, xkcd API (JSON, RSS, Atom), w3m, and reports of seeing it on a Kindle Fire HD; also happens if visiting with a browser that does not support JavaScript (such as Firefox with NoScript)

===Nothing===

[[File:Umwelt blank.jpg]]

In some cases, the comic can be completely absent, with only the top and bottom buttons visible. On most newer browsers, this is caused by a script loading part of the comic via a HTTP request while the rest of the webpage is delivered over HTTPS. This is referred to as [https://developer.mozilla.org/en-US/docs/Web/Security/Mixed_content mixed content] and is blocked on modern browsers by default due to security concerns. This version of the comic is therefore likely not an intended outcome, but rather an unintended consequence of how this comic was implemented. [https://mastodon.social/@chromakode/109531309722997557 It was been confirmed] that this was not intentional and will be fixed. Since this comic's release, all devices viewing it have returned two rows of navigation buttons if near IP address 69.114.249.104.

The http(s) issue seems to have been fixed.

==Transcript==
:'''[This section only covers the first three comics. For the transcript of the entire comic, go to the [[1037: Umwelt/Transcript|full transcript page]].]'''

===The Void===
:[An epic void with a bright light shining right on you.]

===Aurora===
:[Cueball heading out past Megan comfortably sitting in front of a desk.]
:Cueball: Apparently there's a solar flare that's causing some Great Aurorae. CBC says they may even be visible here! Wanna drive out to see?
:Megan: Hockey's on.
:Cueball: Ok. Later.

:[An expansive, marvelous image of emerald green northern lights, floating down through the sky.]

:Megan: See anything?
:Cueball: No, just clouds.
:Megan: Not surprised.

===Aurora-US===
:[Cueball heading out past Megan comfortably sitting in front of a desk.]
:Cueball: Apparently there's a solar storm causing northern lights over Canada. CNN say they might even be visible {Options: "As Far South As Us", "Here in Boston", "Maine", "Ohio", "Oregon", "New York"}! Wanna drive out to see?
:Megan: It's cold out.
:Cueball: Ok. Later.

:[An expansive, marvelous image of emerald green northern lights, floating down through the sky.]

:Megan: See anything?
:Cueball: No, just clouds.
:Megan: Not surprised.

===Snake===
:[Two people standing next to each other. Megan is holding the head end of a snake. Depending on the width of your browser, the snake is: three frames, the third of which has a little bit of a bump; the first frame has a human-size bump, the second has a third person looking at the snake, and the third has the snake going though two Portals; a squirrel and the human-size bump in the first frame, a ring next to the third person in the second frame, and Beret Guy riding the snake in front of the portal; or The squirrel, a fourth person within the snake being coiled, and the human bump in the first frame, the ring, a fifth person in love, and the third person in the second frame, Beret Guy and the portal in the third frame, and the same two people in the fourth frame.]

:Megan: I found a snake, but then I forgot to stop.

:'''[For the transcript of the entire comic, go to the [[1037: Umwelt/Transcript|full transcript page]].]'''

==Trivia==
* The Reddit user [https://www.reddit.com/user/SomePostMan SomePostMan] created a [https://www.reddit.com/r/xkcd/comments/t6wmh/all_umwelt_1037_comics_in_two_imgur_albums/ post] that collected all of the Umwelt comics and added explanations. Much of his information is now included in this wiki.
* At the start of the [https://xkcd.com/1037/info.0.json official transcript of this comic], the writer added a note alluding to its extreme length:
:: <nowiki>[[Two people...]]</nowiki>
:: ((..wait.. <scrolls through a listing of everything> oh goddammit Randall. Thanks a bunch, dude. I better get a raise for typing out all this))
:: [[Two people standing next to each other.
* This comic was released on April 1 even though that was [[:Category:Sunday comics|a Sunday]] (only the third comic to be released on a Sunday). But it was only due to the April Fools' joke, as it did replace the comic that would have been scheduled for Monday, April 2nd. The next comic, [[1038: Fountain]], was first released on Wednesday, April 4th. This was the first that could be different for different readers.
* This comic displays the previous comic, Reviews (1036), when you try to view it on uni.xkcd.com.

{{comic discussion}}

[[Category:Comics with color]]
[[Category:April fools' comics]]
[[Category:Dynamic comics]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Black Hat]]
[[Category:Comics featuring Knit Cap]]
[[Category:Comics featuring Beret Guy]]
[[Category:Comics featuring Danish]]
[[Category:Comics featuring Hairy]]
[[Category:Philosophy]]
[[Category:Penis]]
[[Category:Video games]]
[[Category:Velociraptors]]
[[Category:Your Mom]]
[[Category:Puns]]
[[Category:Squirrels]]
[[Category:Comics with blood]]
[[Category:Characters with hats]]

Talk:2899: Goodhart's Law

2024-02-27T04:19:09Z

172.70.91.165:

I don't think there's anything else that could be included in the transcript, so i'm deleting the incomplete tag. if anyone has an idea to make it better, just add it. i know it seems too soon, but there's really nothing else to the comic. [[User:New editor|New editor]] ([[User talk:New editor|talk]]) 22:17, 26 February 2024 (UTC)

This happens all the time. For instance, a call center whose metric-turned-target is number of calls handled per hour (which sounds good in theory) is incentivised to hang up on callers, who then call back - increasing their "performance" as measured by the target, as it both decreases the time each call takes (thus making time for more calls) and increases the volume of incoming calls. Of course, the side effect is ticked-off customers heading to competitors instead. (Which often doesn't affect the call center as it's a third party.) If the metric-turned-target is getting a good survey response at the end of the call, treating the customer so badly they hang up (and thus don't take the survey) for any call that is going poorly becomes a viable way of improving the measurement of their performance. Creating good targets is HARD. [[Special:Contributions/172.70.43.157|172.70.43.157]] 22:38, 26 February 2024 (UTC)

[[User:Moderator|Moderator]] ([[User talk:Moderator|talk]]) 23:12, 26 February 2024 (UTC)
[[User:Moderator|Moderator]] ([[User talk:Moderator|talk]]) 23:12, 26 February 2024 (UTC)
[[User:Moderator|Moderator]] ([[User talk:Moderator|talk]]) 23:12, 26 February 2024 (UTC)
:The above, by 'Moderator' appears to be a meta-joke. i.e. trying to enhance 'times signed', which of course isn't even a useful measure, at the expense of bringing anything useful to the situation. It was even done in just one edit, so didn't even increase the standard 'contributions' measure that an actual target-hitter might try to hit.
:Either that or they messed up/have other machinations in mind. But I just thought I'd 'dissect the frog' for future readers. [[Special:Contributions/172.70.91.165|172.70.91.165]] 04:19, 27 February 2024 (UTC)

The main problem with metrics is that there can be too many (everything is a metric, you're chasing targets even if just trying to be the most average and not to be an outlier) or there are too few (everything is 'boiled down' to a single figure of 'success', with no nuance available to work out ''why'' it's marked as "good" rather than "excellant ). Or both at the same time! That said, I think changing a target-system to be a less-worse-target-system is often the worst of all worlds, as every meaningful measure is changed, and/or the means to measure them are changed, all this impinging upon the actual job of work that was actually always supposed to be done, regardless... [[Special:Contributions/172.70.91.165|172.70.91.165]] 04:19, 27 February 2024 (UTC)

Talk:2889: Greenhouse Effect

2024-02-05T12:36:42Z

172.70.91.165:

First description! FIRST 🤑 [[User:42.book.addict|42.book.addict]] ([[User talk:42.book.addict|talk]]) 18:45, 2 February 2024 (UTC)

Is there a category or a name for the set of comics which make the observation of "x thing happened closer to Y thing than today"? --[[User:Raviolio|Raviolio]] ([[User talk:Raviolio|talk]]) 18:57, 2 February 2024 (UTC)
:Maybe Category:Timelines could work? [[User:42.book.addict|42.book.addict]] ([[User talk:42.book.addict|talk]]) 19:00, 2 February 2024 (UTC)
:It is also similar in structure to many of the comics in [https://www.explainxkcd.com/wiki/index.php/Category:Comics_to_make_one_feel_old| Category:Comics to make one feel old] but has a quite different theme [[Special:Contributions/172.69.6.156|172.69.6.156]] 23:06, 2 February 2024 (UTC)

Do we have a source for the "their answers closely match modern estimates"? that would be a good thing to add [[User:Happier7713|Happier7713]] ([[User talk:Happier7713|talk]]) 19:35, 2 February 2024 (UTC)

A nit -- the Newcomen atmospheric engine was invented in 1712 and is usually thought of as the first steam engine (at least of the modern, western, world). {{unsigned ip|108.162.245.36 |20:25, 2 February 2024}}
:The Newcomen was certainly started it, and tends to be somewhat overshadowed (I actually walked past ''the'' oldest still-in-place Newcomen beam engine, earlier today... never seen it working (by hydrau;ics, these days), but it's there). But its practical efficiency was limited by its operation, and it took (Boulton and) Watt to make it into the potentially mobile powerhouse that drove much of the really developed stuff (beyond mine-drainage/etc).
:Of course, it was also more fuel efficient, so if we'd have somehow done exactly the same amount of IR via Newcomen-style machines then we'd probably have accelerated the burning of resources across the same period, so... [[Special:Contributions/162.158.74.49|162.158.74.49]] 00:10, 3 February 2024 (UTC)

I would say we did plenty of work. In 1896, noone had any idea what renewable energy is. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 23:48, 2 February 2024 (UTC)

:There have been windmills and watermills and fire from wood for thousands of years. The real problem is fossils, which release co2 from millions of years. In my opinion, it's about the attitude of "the right to consume" instead of "the right to use". --[[User:LaVe|LaVe]] ([[User talk:LaVe|talk]]) 06:35, 3 February 2024 (UTC)

“yet after 128 years there’s been close to no progress to changing our infrastructure to be renewable-energy based.” That might or might not be true, depending on how you define “close to no progress” but regardless of that, the comic does not make any such claim, and that part should be deleted frm the explanation of the comic. [[Special:Contributions/162.158.186.35|162.158.186.35]] 05:06, 3 February 2024 (UTC)

:Given what has appeared in other xkcd comics with a global-warming theme, I think the "close to no progress" reaction is permissible. Whether it is accurate is remarkably hard for me to pin down. A study I found in 2014 said that annual per-capita energy consumption in the USA rose from 100MM to 350MM BTUs between 1900 and 1973, and has since remained almost constant. 1973, of course, was the Arab oil embargo, which stimulated massive investment in energy efficiency that continue to the present day. Each of us now uses many more things for the same energy - but the population is increasing, therefore so is the bulk carbon-dioxide loading. A 2023 US Government attempt to forecast energy use in the USA between now and 2050, I found to be both unreadable and unhelpful in terms of assessing whether we are gaining on energy efficiencies and transition to renewables. There simply were too many variables in the inputs. And as 2020 demonstrated, our response to energy challenges will be forced by economics, not climate politics or comics IMO. [[Special:Contributions/172.71.150.168|172.71.150.168]] 07:22, 3 February 2024 (UTC)

I was unable to find an article by "Crawford 1997" in which either of the quotes cited in the title text appear in full. They might appear in other articles included in the [https://www.jstor.org/stable/i399217 special issue of the journal <em>Ambio</em>] devoted to the work that Arrhenius and colleagues did in the last decade of the 19th century. The two articles by Elisabeth Crawford in that journal, one sole-authored and one co-authored, provide considerable context for the discovery, including the various competing theories about global warming that were being debated among scientists at the time, and the remarkable observation by Arrhenius that such warming was not a bad thing. According to the Crawford sole-authored paper, Arrhenius wrote (translation from Swedish), "It [global warming] "will allow our descendants, even if they only be those of a distant future, to live under a warmer sky and in a less harsh environment than we were granted." [[Special:Contributions/172.71.151.130|172.71.151.130]] 07:04, 3 February 2024 (UTC)
:I feel this assessment should be included in the explanation. Not just because it hints at one reason for climate inaction in cold-to-temperate regions. It also points to a central issue of climate justice: A ''White'' Swedish scientist in 1895 thought of milder winters, but people closer to the equator, who were summarily ignored by the ''White'' scientific community on racist grounds in 1895, are now about to face physically unbearable hothouse conditions. The quote also shows how little this scientist knew about the land that sustained him - every peasant whom he would have bothered to ask could have told him that a +8°C change in temperatures would have devastating effects on agriculture because most plants can't adapt to it and agricultural knowledge of the local soil and climate, that has been painstakingly developed over centuries of famine, would be rendered mostly useless, everywhere. [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 13:22, 4 February 2024 (UTC)
::I contemplated doing so, but refrained, because I feared it would transform an explanation into a polemic. The main point of the comic, I argue, is that humans have known about global warming, and anthropogenic carbon dioxide's role in it, for far longer than most of today's narratives state, and, in an explanation, it is sufficient to point this out. Those with Bibles may find the ethical underpinnings for this comic and its message in the [https://www.biblegateway.com/passage/?search=John%209&version=NRSVUE ninth chapter of John], particularly v. 41: “If you were blind, you would not have sin. But now that you say, ‘We see,’ your sin remains." For my part, I find the principal explanation for climate inaction (not just in the temperate zones, air-conditioning fans) in the concept of "personal advantage". I once estimated that, to bring per-capita energy use in the USA, anno 2014, down to the level current in 1957, that use (thanks to population increase) would have to correspond with energy usage in 1900. No aircraft, few cars, almost no electricity infrastructure and therefore nothing that depends on that infrastructure. I have not attempted to estimate what the energy usage would have to be to bring today's per-capita allotment to the level current in 1896; I suspect it would require the dismantling of the Industrial Revolution in its entirety. In token of this, I used to walk two miles each way to work. A co-worker saw this, patted me on the head, said "That's nice", and drove off, alone, in deir SUV. Oh ... the co-worker led a climate-change research lab. No one will willingly accept a reduction in standard of living, and, I argue, any attempt to force this will put authoritarian climate deniers at the head of government everywhere. Nor do I accept that [https://www.dude-n-dude.com/2020/08/23/kris-an-murphy-wunderwaffe/ <em>Wunderwaffe</em>] will save us ... and those concerned with "climate justice" may well ask who among us can afford such toys.[[Special:Contributions/108.162.245.33|108.162.245.33]] 16:18, 4 February 2024 (UTC)
:::Yes, that kept me from adding the point directly. It must be done ''very carefully''. Still, the title text - which quotes Arrhenius in a misleading context to make that point! - seems to bring up the question if climate change is just a "trifling" change in lifestyle ("warmer skies") or an existential threat (general assessment these days), so it feels like part of the explanation. @108.162.245.33: Climate justice is not so much about technology as it is about fair access to mitigation. You're asking if each US citizen could afford the time, effort and money for a change in polluting habits. But none of the people who are and will be dying of climate change can afford your and my current habits. We've got centuries of "right to exploit & consume" attitude / experience with exploitation to repair, which obviously requires a concerted effort, not just individual tweaking. xkcd's reach goes well into the most affected areas, I would like to see that taken into account. (e.g. I suspect middle-class urban India to be avid readers, and to be well aware that ACs won't work for a barely electrified slum district at +42°C, and that the problem isn't so much the lack of ACs, but the poverty of slums, and the +42°C) [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 10:17, 5 February 2024 (UTC)

Arguably, it was Abraham Darby's invention of the coke fired blast furnace in 1709, that vastly increased iron production, was the real start of the industrial revolution and use of coal as a fuel. (It was actually banned in some places as being a dirty fuel for cooking and heating) Of course that would mess up the nearer to / further from dates that this series of comics use. [[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 09:51, 3 February 2024 (UTC)

I would not use the expression "renewable-energy based.", but i would use "Co2 free" or similar. The main problem with climate change is CO2, not lack of renewables. Plus renewables are not the only CO2 free energy source. E.g. the nuclear energy is too a CO2 free energy source. And the only renewable source able to cover the baseload is hydropower, that is not available in the right amount everywhere. For instance take a look on Germany CO2 emissions. {{unsigned ip|172.71.114.107|10:00, 3 February 2024}}
:That's why it's called "renewable-energy ''based''", not "using renewable energies, too". "Renewable" doesn't refer to just a CO2 neutral process, but to a process that can be sustained infinitely (within the sun's life span as a main sequence star), which is clearly not the case for uranium-based energy sources. Maybe "sustainable" is the word we're looking for? [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 13:22, 4 February 2024 (UTC)
::Although nuclear energy is a CO2 free energy source, it creates nuclear waste that is hard to get rid of. I believe that we need to invest in developing infrastructure to properly store energy via batteries so that we can create sustainable energy without creating so much waste. [[User:42.book.addict|42.book.addict]] ([[User talk:42.book.addict|talk]]) 02:13, 5 February 2024 (UTC)
:::Mass batteries? For which you probably need lithium. Which we're not yet geared up to get in a 'sustainable' manner. In large quantities if you're going big on buffering power. (If not lithium, then there's same/different issues, or both.)
:::The solution is going to be a complex balancing act of old and new thinking, which needs rebalancing all the time. At least we (technically) know how to deal with nuclear, or at least how to not be totally reckless with it, as we (hopefully) move towards developing who-knows-what to make it less necessary to continue with less sophisticated/more problematic solutions.
:::Ever onward, ever onward. Expect hiccoughs along the way, of course. [[Special:Contributions/141.101.99.210|141.101.99.210]] 02:58, 5 February 2024 (UTC)
::::Only if you take a very narrow definition of 'battery' (and I'll assume here that you're using 'lithium' as synecdoche for 'the kind of resources that need to be extracted to make chemical action based batteries'). You can store energy using other approaches, such as using it to heat up materials which can release it when needed, or pumping water up to the top of a mountain, and probably lots of other ways that haven't even been thought of yet. Those are all effectively 'batteries', both in function and in the original sense of the word.[[Special:Contributions/172.71.242.206|172.71.242.206]] 09:27, 5 February 2024 (UTC)
:::::I used "(If not lithium, then there's same/different issues, or both.)" to shortcut that discussion. Electrolytic batteries have older (less capable) and newer (less mature) technologies than lithium, but lithium is at the apex of use without us really having developed volume/efficiency of supply (tapping geothermal waters for perhaps ''both'' heat and precipitating dissolved lithium salts ''might'' be better than scouring salt-flats, etc, but it's a matter of developing the scaled industries). Meanwhile, "hot gravel pressure tanks" or "mineshaft-wound weights" for non-electrical storage are early in development, with large-scale Pumped Storage Hydropower is heavily geography-confined (easier in hilly areas, like Ffestiniog or above Loch Awe, to mention two prominant 'local' examples) and while picking the top of ''any'' vague hill might help, see the issue with Taum Sauk. (Pumped-storage tidalpower might be useful for offshore (whatever the state of water, perhaps you can pump/generate in or out, as necessary), or the inverse pumped 'air-storage' submarine reservoirs, but engineering and environmental issues need a great deal of attention.) Maybe combined with electrolysis, when there's a possible power surplus (pipe the ''light'' hydrogen to the top, then burn(+generate!) to recombine into water which can be added to the top again, not having had to shift most of the mass back to the top) could help with some future projects. But that's the future. Less so than 'safe' and mature fusion, probably, but something that can match any given typical solar farm (not necessarily adjacent, but maybe... or beneath) is probaly lithium batteries. Maybe molten-salt (especially directly focussed Sun-reflection heated, as and when it can be), but that's still a bit bleeding-edge itself.
:::::Home-scale solar-backup (or as a priority over excess feed-in back to the grid) is going to be either new or old battery tech, and new means lithium, pretty much (old means lead-acid, perhaps). Megawatt/Gigawatt facilities push the tech, often, but right now if you want reliable and yet not too much anachronism/experimentalism then upscaled lithium battery 'parks' is your go-to... [[Special:Contributions/172.71.178.111|172.71.178.111]] 12:26, 5 February 2024 (UTC)

Here's another quote from the Crawford paper:
<q>He proposed to calculate the changes in CO2 necessary to bring about periods of both milder (+8°C) and harsher climate (-5°C), i.e., the conditions which reigned before, during and etween the Ice Ages. His preliminary calculations showed that the required changes in CO2 were in the order of 50%. Hogbom, who was present, confirmed that those changes could have occurred in geological times. It remained, however, to demonstrate this quantitatively. The construction of the model which enabled him to do so occupied him for most of 1895. Writing to a friend at the end of the year, he found it "unbelievable that so trifling a matter has cost me a full year" (5). But his complaints in letters to other friends about how difficult it was to bring the "carbonic acid matter" to an end showed how arduous a process this had been.</q>
- This suggests to me that Arrhenius thought the development of a quantitative model to be a "trifling matter" a.k.a. "trivial" in 1894, but it turned out to be a really difficult mathematical problem. So the "trifling matter" possibly doesn't refer to "hypothetical CO2 concentration in far-off eras", as the title text suggests, but to Arrhenius' initial estimation of the mathematical problem. [[User:Transgalactic|Transgalactic]] ([[User talk:Transgalactic|talk]]) 13:22, 4 February 2024 (UTC)
:Good get! [[Special:Contributions/172.71.151.153|172.71.151.153]] 17:29, 4 February 2024 (UTC)

2880: Sheet Bend

2024-01-13T16:38:05Z

172.70.91.165: /* Explanation */

{{comic
| number = 2880
| date = January 12, 2024
| title = Sheet Bend
| image = sheet_bend_2x.png
| imagesize = 317x244px
| noexpand = true
| titletext = A left-handed sheet bend creates a much weaker connection, especially under moderate loads.
}}

==Explanation==
{{incomplete|Created by a SHEETTY BEND - Please change this comment when editing this page. Can anyone elaborate on of this knot is right handed and what the differnces to a left handed would be and why this would decrease the strength of the knot as mentioned in the title text. Do NOT delete this tag too soon.}}
This is the seventh installment in the series of [[:Category:Cursed Connectors|Cursed Connectors]] and presents Cursed Connectors #46: The Sheet Bend. At the time of release this was the lowest number used for a cursed connector, with #286: [[2507: USV-C]] being the one with the highest number after those seven comics.

This comic shows two double-core wires being joined to make an electrical connection. Instead of the join being made the conventional way, that is, silver being joined to silver and gold being joined to gold within the insulating white cable, the diagram shows each core being connected to a ductile outer sheath, then the wires being tied together such that the outer sheaths touch and the connection is completed that way.

This is not the way electrical connections are usually made, as you might get an electric shock from touching the outer side of the wires, if the current being passed was significant enough, and the possibility of contact between any of the wire's conductors and any other item (bridging gaps, leaking signal or possibly even ''introducing'' external interference) could be problematic for both high and low ampage cables (e.g. used to transmit power or just signals). Most connectors, even those like the relatively exposed {{w|punch-down block}} or {{w|Screw terminal block}} types, would use some structural housing (and even {{w|AC power plugs and sockets#Protection from accidental contact|other methods}}) to ensure that the 'live' ends of a socket/plug/hybrid terminator are not trivially contactable to other exposed wires or objects/people, generally according to the relative dangers from, or to, the equipment to which the cable is connected.

If this knot were tightened, the gold and silver connectors would probably touch, shorting out the circuit, but there is also the possibility of the cable slipping loose (perhaps by improper tensioning or handling of the knot, from the start) and the exposed conducting sheaths making other improper/dangerous connections across or beyond the knot itself. In both cases, the connection of the 'connector' would be at least become unreliable, even if it only disconnected the intended contact-points due to slippage – whether or not it became mechanically untied.

The knot used to tie the two halves of the cable is a {{w|sheet bend}}, which is often used to join two ropes of different thicknesses, and explains the name for this type of cursed connector.

The title text says that a left handed sheet bend would provide a weaker connection. An actual left handed sheet bend provides less strength to the knot. This makes the title text a pun on the double meaning of "moderate load" (as in a moderate amount of weight or a moderate amount of electricity). The difference between a left handed and right handed sheet knot is the free ends of the knots are on the same side in a right handed sheet knot (here both on the bottom side), but on opposite sides in a left handed sheet knot.

==Transcript==
:[Above the drawing there is a header. Below the header there is a double-core wire going in from the left and stopping just past the middle of the picture. It shows how the inside of the wire looks and how the silver and golden wires inside are connected to two rectangular pieces of silver and golden material respectively. The golden piece is to the left and the silver piece to the right, closest to the end of the wire. Beneath this wire is shown two double-core wires forming a knot of the sheet bend type. Here it becomes clear that the silver and golden pieces are on the outside of the wires (but connected to the wires running inside the wires). In the knotted part of the wires gold touches gold and silver touches silver, without them touching the other color. Beneath this knot there is a label for the connector.]
:Cursed Connectors #46:
:The Sheet Bend

{{comic discussion}}

[[Category:Cursed Connectors]]
[[Category:Comics with color]]

2875: 2024

2024-01-02T18:41:41Z

172.70.91.165: Undo revision 332015 by 172.69.71.13 (talk)

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[https://encyclopediadramatica.online encyclopediadramatica.online]
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== Headline text ==
<noinclude>:''This page refers to the comic named "2024". For comic #2024, see [[2024: Light Hacks]].''</noinclude>
{{comic
| number = 2875
| date = January 1, 2024
| title = 2024
| image = 2024_2x.png
| imagesize = 740x553px
| noexpand = true
| titletext = It wasn't originally constitutionally required, but presidents who served two terms have traditionally followed George Washington's example and gotten false teeth.
}}

==Explanation==
{{incomplete|Created by OBAMA'S TEETH - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
In what starts off almost like a "[[:Category:Comics to make one feel old|doesn't time fly?]]" scene, the unstoppable progression of the calendar is observed, as [[Ponytail]] points out that it's now 2024. [[Cueball]], in response, notes that it is an election year, in this context a {{w|President of the United States#Election|US ''Presidential'' election}} year, which occurs every four years and has (in one form or other) since 1788. Ponytail then replies in some form of exasperated tone that they "keep on happening", which is true but (normally) unsurprising, even/especially with other major elections happening every two years, presumably not compared to how [https://www.bristol247.com/news-and-features/news/youre-joking-not-another-one/ some other democracies] might be less predictable/more frequent.

On top of this, Ponytail seems to have not been aware (or maybe has chosen to forget) the passing of two whole election cycles (and two newer incumbents) as the discussion focuses upon {{w|Barack Obama}}, the ''former'' US President. Ponytail seems to be quite behind the times as she asks if Obama is still president (he left office January 20th, 2017, which was 7 (!) years ago, a fact that Cueball cannot quite believe Ponytail is ignorant of). Ponytail states that she liked him, and wonders if he'll be up for taking on the position again. But Cueball states that he ''can't'' be made President again, having already served two terms, which Ponytail confirms by checking for herself the details of the {{w|Twenty-second Amendment to the United States Constitution}}.

The humor in the comic comes in the second half; Cueball and Ponytail discuss whether Obama is the same person (like the mythical {{w|Ship of Theseus}}, most of his constituent cells are frequently replaced), with Ponytail looking into the possibility of Obama's re-election based upon philosophical/biological technicalities (as applied to the Constitution's words), rather than as legal/political convention might normally suggest. But when even that approach is seen to be wanting, requiring a wait significantly exceeding 30 years, Ponytail suggests negating that issue by having all of Obama's teeth removed and replaced with false teeth.

In order to facilitate the latter goal, Ponytail announces her intention to consult a dentist and (for exact reasons that can only be guessed at) a lawyer. Seeing where her current misplaced, and {{w|Dunning–Kruger effect|less than informed}}, zeal might be leading her, Cueball gives his prediction that the probable {{w|Supreme Court of the United States|ultimate legal arbiters}} of her plan might be unanimous in rejecting its validity (if not dissuading its attempt). SCOTUS being unanimous on an issue is now a [https://www.scotusblog.com/2022/07/as-unanimity-declines-conservative-majoritys-power-runs-deeper-than-the-blockbuster-cases/ comparatively rare event].

The title text references {{w|George Washington's teeth|George Washington's (in)famous 'false teeth'}}. Washington's dentures are often falsely claimed to be made of wood; in truth they were ''real'' teeth procured from other sources. Regardless, this would have likely resolved the rather specific problems established in the philosophical conundrum, and the title text claims that other presidents used this plan to get around the Constitutional limitations concerned in case they wanted to serve more than two terms.

However, no one has yet even ''needed'' to carry out this plan. Only one President has exceeded the limit; {{w|Franklin D. Roosevelt}} died in office during his ''fourth'' term, but he served prior to the 22nd Amendment and was thus unaffected by the rule, which was enacted six years after his death. (FDR did have a partial denture, but given that he retained some of his natural teeth, he did not engage in Ponytail's proposed scheme.) Presidents since then have definitely tried various schemes aimed at securing a second term, with both successes and failures, but nobody has yet planned ''this particular plan'' to achieve a third or beyond. Or at least one can assume that those that perhaps did (including, as noted, all those who were not yet 'required' to go to these lengths) failed to attain their goals for entirely different reasons.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Ponytail and Cueball are walking.]
:Ponytail: So this is 2024.
:Cueball: Yup. Guess it's an election year now.
:Ponytail: Again? Man, those just keep happening, huh?

:[Ponytail and Cueball now standing.]
:Ponytail: Who's the president these days, anyway? Is it still Obama?
:Cueball: What? No? He hasn't been... How do you not...

:[Ponytail and Cueball still standing.]
:Ponytail: Darn, I liked him. Is he running this time?
:Cueball: No, he's not allowed to.
:Ponytail: He's not? Why?
:Cueball: Constitution.

:[Ponytail checks her smartphone.]
:Phone: ''Amendment 22''
:Phone: No person shall be elected to the office of the president more than twice
:Ponytail: What?? C'mon...

:[Ponytail talking to Cueball.]
:Ponytail: Don't all your cells get replaced every seven years, Ship of Theseus-style? Is he even the same person?
:Ponytail: Maybe "no person shall be elected more than twice" isn't a prohibition, it's more of an observation, like "you can't step in the same river twice."

:[Zoom in on Cueball.]
:Cueball: Isn't the cell thing a myth?
:Cueball: I think tooth enamel has a turnover half-life of 30+ years. His teeth molecules are probably the same.

:[Ponytail heads off with a finger raised.]
:Ponytail: So if Obama just gets false teeth, he can run again! I need to talk to a dentist and a lawyer!
:Cueball: The Supreme Court is about to vote 9-0 to block your number.

{{comic discussion}}

[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Cueball]]
[[Category:Elections]]
[[Category:Politics]]
[[Category:Biology]]