explain xkcd - User contributions [en]

Talk:732: HDTV

2023-02-09T13:18:57Z

172.70.134.194: its readable now :) ~~~~Bumpf

But it's on a ''bigger screen''. Jokes aside, I believe TVs are more impressive because the refresh rate is higher and the TV needs more circuitry on the back-end to handle the physically larger screen and the multiple possible inputs. I may be wrong. '''[[User:Davidy22|Davidy22]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 13:25, 18 February 2013 (UTC)

The commentary about computer screen sizes needs to be dated and/or updated, as it's clearly outdated. [[Special:Contributions/108.162.212.196|108.162.212.196]] 17:17, 11 January 2014 (UTC)
: I don't think that's the case. TV's rely on standards, think of blu-ray, dvd, VHS, DVB-C (cable). A change in media format would require users to buy a new hardware, people are likely not willing to buy new equipment every two years. For computers it's different. The video output is generated and not played back. Computers are more flexible and if a format is not supported a simple update can fix everything. [[User:Necessaryevil|Necessaryevil]] ([[User talk:Necessaryevil|talk]]) 15:25, 13 December 2018 (UTC)

Talk:2705: Spacetime Soccer

2023-01-24T18:16:48Z

172.70.134.194:

Wow, that was fast {{unsigned ip|172.70.131.8|03:48, 1 December 2022‎}}
:What was? [[Special:Contributions/172.70.162.46|172.70.162.46]] 04:27, 1 December 2022 (UTC)
Does someone want to point out to Randall that it is the offside rule, not offsides rule [[Special:Contributions/172.70.134.122|172.70.134.122]] 04:57, 1 December 2022 (UTC)
:It's often pluralized in American English, per Wikipedia: https://en.m.wikipedia.org/wiki/Offside_(sport) [[Special:Contributions/172.71.151.44|172.71.151.44]] 05:22, 1 December 2022 (UTC)
:That makes no sense, it's an adjective, not a noun. It can't be pluralised. Even that wikipedia article, despite its assertion at the top, doesn't at any point use "offside" as a noun.
::Side is a noun. It's colloquial in the US because other games use the same word. [[Special:Contributions/172.70.206.92|172.70.206.92]] 12:03, 1 December 2022 (UTC)
:::Interesting that the inherent pluralisation doesn't extend to "math(ematic)s"... ;) [[Special:Contributions/172.70.86.61|172.70.86.61]] 12:27, 1 December 2022 (UTC)
::::That's because "math" is a contraction, just the first four letters, the rest of the word is dropped. :) The British "maths" is weird because it just drops several letters in the middle, not sure I've ever seen another contraction like that without an apostrophe to stand in for the missing letters like "can't", "won't", "cont'd"... [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 06:12, 3 December 2022 (UTC)
::::In the US, the only time you would use "maths" is when it is genuinely plural: "I'm having trouble with my class schedule. I'm taking four maths concurrently." [[Special:Contributions/172.70.134.194|172.70.134.194]] 18:16, 24 January 2023 (UTC)
:: Seems like a noun to me, it's the name of a place, isn't it? The part of the field you're not supposed to be? An "out of bounds" that's within the field? To be an adjective it would need a noun (besides "rule")... [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 06:23, 3 December 2022 (UTC)
:::Adjectival rules without nouns? "Commutative rule", etc. No nouns needed.
:::(I've no idea whether any of the other rules of football, from 1863 onwards, are named like that. Footie's not my sport, though I do at least inow what to be offside means, even if I couldn't tell at a glance whether any particular combination of players and ball might be in danger of invoking it.) [[Special:Contributions/172.70.90.173|172.70.90.173]] 22:11, 3 December 2022 (UTC)
:I can only imagine that Randall used the less-preferred (more-despised?) term to troll some of us. Does he not like the beautiful game? [[Special:Contributions/172.70.214.252|172.70.214.252]] 01:15, 2 December 2022 (UTC)
:I've never heard "offsides" plural, I don't think, but I don't exactly watch any sports. :) I can imagine such people think it's short for "off the sides", there's two sides to the field, thus plural. Never mind that if you understand the rule - and from me that is SAYING SOMETHING - there's only one side to be off of. :) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 06:23, 3 December 2022 (UTC)
:It feels like a deliberate joke to me, offside rule on a 2D pitch, but if space is bendy and there is an extra dimension, then more than one way to be offside makes sense, and offside rules doesn't sound as funny.[[Special:Contributions/172.70.86.62|172.70.86.62]] 14:22, 4 December 2022 (UTC)
::This explanation gets my vote, 3D field has more ways to be offside, :) "Ref! He fell down the gravity well! OFFSIDE!" [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:25, 17 December 2022 (UTC)

I currently have no time to expand the explanation, but it should be pointed out that the gravity well drawing is a graph and not an actual surface. Also, people are perfectly fine with moving though 4 dimensional spacetime. We do it every day. [[User:Condor70|Condor70]] ([[User talk:Condor70|talk]]) 09:19, 1 December 2022 (UTC)
[citation needed] [[Special:Contributions/198.41.242.83|198.41.242.83]] 09:59, 1 December 2022 (UTC)
:...though note that I probably can't ever go back to where I was yesterday. [[Special:Contributions/172.70.86.61|172.70.86.61]] 12:27, 1 December 2022 (UTC)
::That has more to do with the fact that you flooded the museum's basement than spacetime though [[Special:Contributions/172.69.22.62|172.69.22.62]] 15:24, 1 December 2022 (UTC)
:::I did not! I flooded their second floor. It was ''their'' fault that the basement subsequently flooded (and gained a few new items/display cases/members of staff and also an improved influx of visitors to the "Dried Goods Through The Ages" exhibit that they already kept down there), but they still blamed me for some strange and probably erroneous reason... [[Special:Contributions/162.158.159.30|162.158.159.30]] 16:36, 1 December 2022 (UTC)

I'm pretty sure it mocks the fact that in the rest of the world, "football" is the sport where you play the ball with your *feet*, with a particular obscure rule that you can't touch it with your hands (unless you are a goalkeeper). On the other hand, American "football" is the sport where you grab the ball with your hands and carry it around. [[Special:Contributions/172.71.160.43|172.71.160.43]] 16:35, 1 December 2022 (UTC)
:In actuality, most of the native-English-speaking world (Australia, Canada, New Zealand, Republic of Ireland, and South Africa) tend to refer to association football as "soccer" because another football game is more dominant (Australian football, gridiron football, Rugby union or league football, Gaelic football) and "association football" is a mouthful. This goes back at least to the 1882 founding of the South British Football Soccer Association in New South Wales. Football is not a game; it is a category of games played on grass, on and partly with the foot, without any sort of stick.[[Special:Contributions/172.71.154.41|172.71.154.41]] 09:49, 2 December 2022 (UTC)

haha...I thought there actually was ''[more]'' [[Special:Contributions/172.71.182.155|172.71.182.155]] 22:10, 1 December 2022 (UTC)
:Can we get a scoreboard here for everyone who clicked on "more" somehow expecting more... :) [[User:RandalSchwartz|RandalSchwartz]] ([[User talk:RandalSchwartz|talk]]) 04:54, 2 December 2022 (UTC)
:This part of the title text is not currently mentioned in the explanation, but it is clearly intentional. I think it is suggesting that the editor/writer disappeared before finishing the thought, but I'm open to other interpretations. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 02:27, 3 December 2022 (UTC)
:Second this. Though being on firefox/XFCE, the popup disappeared for me when moving the mouse. I actually had a look at the source code to see if there is any magical link there... Possible interpretations could also include that the gravity well appears to be have more stuff in there but in the real world there is nothing there...or everything?...well, singularity! --[[Special:Contributions/162.158.86.253|162.158.86.253]] 10:55, 3 December 2022 (UTC)

Hey, there's a new [[what if]] post [[Special:Contributions/172.70.254.165|172.70.254.165]] 19:25, 2 December 2022 (UTC)
:Hey, added it —[[User:While False|While False]] ([[User:While False/explain xkcd museum|'''museum''']] | [[User talk:While False|talk]] | [[special:Contributions/While_False|contributions]] | [[special:Log/While_False|logs]] | [[Special:UserRights/While_False|rights]] | [https://www.explainxkcd.com/wiki/index.php?title=User:While_False&printable=yes printable version] | [https://www.explainxkcd.com/wiki/index.php?title=User:While_False&action=info page information] | [https://www.explainxkcd.com/wiki/index.php/Special:WhatLinksHere/User:While_False what links there] | [https://www.explainxkcd.com/wiki/index.php?title=Special:RecentChangesLinked&days=30&from=&target=User%3AWhile_False related changes] | [https://www.google.com Google search] | current time: {{CURRENTTIME}}) 19:42, 6 December 2022 (UTC)

Hi, slightly unrelated, but you might enjoy this view fom Nantes/France: https://www.google.de/maps/@47.2144483,-1.55127,3a,75y,9.78h,63.87t/data=!3m8!1e1!3m6!1sAF1QipPNXGaLLRDirF9DunsP01gOMmOgkh3EIH2faAUk!2e10!3e11!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipPNXGaLLRDirF9DunsP01gOMmOgkh3EIH2faAUk%3Dw203-h100-k-no-pi-0-ya118.37107-ro-0-fo100!7i6080!8i3040

This reminds me of the World State's sports in Brave New World, like Electromagnetic Golf, Escalator Squash, and Riemann Surface Tennis. [[User:Take The A Train To Watertown|Take The A Train To Watertown]] ([[User talk:Take The A Train To Watertown|talk]]) 22:14, 5 December 2022 (UTC)

Is that a mirror or a drawing?[[Special:Contributions/172.70.54.52|172.70.54.52]] 17:33, 6 December 2022 (UTC)
That is a round mirror. Here's a different view: https://www.google.de/maps/@47.2145041,-1.551262,89m/data=!3m1!1e3

== ChatGPT explanation ==

When I asked for an explanation with the usual prompt ("The following is the transcript from an xkcd comic. Please write an explanation of the comic. The title text should be explained in a seperate paragraph at the end:") ChatGPT produced nothing more than a paraphrase of the transcript. It was a good paraphrase, and easier to read than the transcript, but it wasn't an explanation of the comic at all, so I said, "Explain the joke of that comic." The result was this:

: The joke of the comic is that the sport of Spacetime Soccer, also known as 4D Football, is a defunct sport that was criticized for the number of players who fell into the gravity well and for the complex math required to determine the offside rule. The visual distortion of the soccer pitch due to the gravity well, as well as the stick figures on the field, adds to the humor of the situation. The title text further emphasizes the absurdity of the sport by mentioning its inconsistencies and the disappearance of players during games.

It's clear we're not going to be satisfied automating with this prompt, but it's a useful tool for producing simple explanations if operated manually. [[Special:Contributions/172.71.158.230|172.71.158.230]] 17:52, 7 December 2022 (UTC)

2721: Euler Diagrams

2023-01-07T03:44:52Z

172.70.134.194: /* Explanation */

{{comic
| number = 2721
| date = January 6, 2023
| title = Euler Diagrams
| image = euler_diagrams_2x.png
| imagesize = 370x409px
| noexpand = true
| titletext = Things Leonhard Euler created ( most of math ( overlapping circle diagrams ) a cricket bowling machine ) Things John Venn created
}}

==Explanation==
{{incomplete|Created by JOHN EULER AND LEONHARD VENN - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In this comic, [[Cueball]] is showing an off-screen person a {{w|Venn diagram}} he made about something. The off-screen person then informs Cueball that it is in fact an {{W|Euler diagram}}, not a Venn diagram. Cueball then proceeds to complain that {{w|List of things named after Leonhard Euler|many things}} are named for {{w|Leonhard Euler}} (specifically {{w|Euler's constant}} and {{w|Euler's function}}) and and wants to call the diagram a Venn diagram to give {{w|John Venn}} more credit. His off-screen friend refuses, and mockingly states that numbers are now called "Euler letters", which is currently false.{{citation needed}} Modern {{w|Arabic numerals}} predate Euler by at least a century, and other numerals existed before that.

A Venn diagram is "a widely used diagram style that shows the logical relation between sets". It shows overlap of items in different categories (sets) by using overlapping circles (or other shapes) to stand in for categories. If an item is within a certain circle, it is in the category the circle represents. So in a Venn diagram of "animals" and "fuzzy things", cat would be in the overlap between both circles, frog would be inside only "animals", and "kiwifruit would only be in "fuzzy things". "Crystals" would be outside both circles. In a Venn diagram, all 'circles' must overlap with all other circles, even if there are no items in the overlap. This is easy enough for 2 and 3 sets, but as the number of sets increases the diagrams can get [https://www.newscientist.com/article/dn22159-logic-blooms-with-new-11-set-venn-diagram/ rather complicated], and the sets can start looking very non-circular. An Euler diagram depicts only the non-empty combinations, and therefore does not have this constraint.

[[File:Euler Diagrams title text.png|300px|thumb|right|The title text as a Venn diagram]]
The title text is an example of a "written" Venn diagram, with Leonhard Euler creating "most of math", John Venn creating a {{w|cricket}} bowling machine, and both of them having created overlapping circle diagrams.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}} 
:[Cueball is standing in front of a whiteboard with his palms raised. The text "Venn Diagram of" is visible in large letters, with "of" on the next line and slightly smaller. Below this are two squiggly lines representing illegible text, followed by three partially overlapping circles with a number of squiggly lines in them.] 
:Friend (offscreen): Actually, that's an ''Euler'' diagram, because-
:Cueball: Come '''''onnnn.'''''
:Cueball: '''''Everything''''' is named after Euler. Euler's constant, Euler's function.
:Cueball: Can't we let John Venn have this?
:Friend (offscreen): No.
:Friend (offscreen): Also, numbers are now "Euler letters."

{{comic discussion}}
[[Category:Comics featuring Cueball]]
[[Category:Math]]
[[Category:Euler diagrams]]
[[Category:Venn diagrams]]
[[Category:Sport]]

2715: Pando

2022-12-23T17:59:19Z

172.70.134.194: Fixed a "citation needed".

{{comic
| number = 2715
| date = December 23, 2022
| title = Pando
| image = pando_2x.png
| imagesize = 422x372px
| noexpand = true
| titletext = The presents under the tree are actually a single gift connected by an underground ribbon system.
}}

==Explanation==
{{incomplete|Created by a CHRISTMAS PANDA — Please change this comment when editing this page. Do NOT delete this tag too soon.}}

{{w|Pando_(tree)|Pando}} is a {{w|Populus tremuloides|quaking aspen}} tree colony in {{w|Fishlake National Forest}}, Utah. Depending on how you measure[https://www.youtube.com/watch?v=vWAA-SrrFUQ], Pando is the largest living organism on earth, and is thereby also the largest tree on earth. By dry mass (weight not including water), Pando is the largest living thing humans have found. There is [https://www.forbes.com/sites/linhanhcat/2019/02/22/largest-organism-in-the-world/?sh=43fdf2a444ac one fungus in Oregon] which may weigh more including water, but that fungus is not a tree{{citation needed}}.

Pando is a Tree colony, a type of {{w|Clonal colony}} made of trees. Clonal colonies all form from the same seed or other origin, and are all genetically identical. Tree colonies spread using their extensive root system. Under all trees there are {{w|Root|roots}}, which gather nutrients and water from soil. On clonal trees (such as the {{w|Populus tremuloides|Quaking Aspen}}, Pando's species), when roots from one tree surface they can form another stalk/tree. This additional stalk is a genetic clone of the original. This clone then grows its own root network, and where they surface they too form more clones. However, crucially, the roots between the clones do not naturally separate, so all clones naturally stay attached. Each clone has a limited lifespan, only a few decades/centuries, but the colony can live for millennia. For example, the only known wild example of {{w|Lomatia tasmanica|''Lomatia tasmanica'', aka King's lomatia}}, is a clonal shrub thought to be at least 43,600 years old, and Pando itself is thought to be around 14,000 years old.

{{w|Christmas}} is a celebration on the 25th of December, traditionally celebrating the birth of {{w|Jesus}}, which is often claimed to be built heavily upon pagan traditions[https://chefin.com.au/blog/these-6-christmas-traditions-are-actually-pagan-customs/] (though this is disputed by historians[https://historyforatheists.com/2020/12/pagan-christmas/]) and annual social customs, then arguably converted into a far more secular event (with or without rampant consumerism). This comic was published on the 23rd of December, 2 days until Christmas, or [[Christmas Eve Eve]]

The concept of a {{w|Christmas tree}}, itself, is rooted in various pre-Christian folkloric traditions and, in the modern era, may be adapted or adopted as required by local and personal circumstances. It need not be an {{w|Evergreen}} fir tree with an angel (or star) atop, though that is the oft-depicted image in either great detail or as a simplified cartoonish depiction, but can be merely any handy plant (or artificial substitute) strewn with such decorations and/or {{w|Christmas lights|lights}} as the owner wishes. Because humans are, well, humans, people and places often compete to hold the record for the largest Christmas tree. At time of publishing (and writing), the tallest Christmas tree is officially a 64.36m (221ft) tall {{w|Douglas fir}} that was displayed in {{w|Northgate Station (shopping mall)|Northgate Shopping Center}}{{Actual citation needed}}, Seattle, WA in 1950[https://www.guinnessworldrecords.com/world-records/77271-tallest-christmas-tree][https://www.historylink.org/File/21359]. The most widely spread, however, is likely the [https://www.italybyevents.com/en/events/umbria/world-largest-christmas-tree-gubbio/ Christmas tree display] in {{w|Gubbio}}, a town in Umbria, Italy, where hundreds of trees on a mountain face are lit up with light to form a Christmas tree shape.

Sidenote: A lot of articles say that the Gubbio tree has a Guinness world record. However, I can't find a citation for that. If anyone can, please add it. That would be appreciated.

In this comic, [[Randall]] proposes putting Christmas lights all the way around Pando to turn into (technically) a Christmas tree. As Pando is the worlds largest tree then, if this plan were to be carried out, it would safely take the record and hold it for quite some time. In the inset map, Randall has drawn the Christmas lights as a [https://en.wikipedia.org/wiki/Convex_hull convex hull] around the edge of Pando. [https://www.google.com/maps/d/edit?mid=1Wgz5CxvxHC7FKMHWp5zkPQuQsZevBqU&usp=sharing Roughly tracing Pando on Google Maps] reveals its perimeter to be roughly 2.77km or 1.72 miles, or roughly 9,000ft. Allowing a little wiggle-room and securing, 9,300ft of Christmas lights seems about right.

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

:[The main comic frame is a profile view of a number of separated trees, of varying heights and maturity, across each of which (of those with sufficient height) has apparently been draped a single chain of decorative lights that goes from off-image at one side to off-image at the other.]

:[Inset in the bottom right is a mini-map implicating that these light-linked 'trees' are actually all risers from a single large superorganism (as a shaded complex but contiguous shape labelled "Pando"), the map has a "N"orth pointer, a scale bar indicating the length of "1,000 ft" (approximately a third of the shaded mass's full width) and a convex hull perimeter line tightly fitting the shaded area that has an indicative arrow from a label informing us that its length would be "9,300 ft".]

:[Caption below:] Christmas Science Fact: Pando is approximately 9,300 feet of lights away from being the world's largest Christmas Tree.

{{comic discussion}}

[[Category:Comics with lowercase text]]