explain xkcd - User contributions [en]

Talk:1730: Starshade

2023-08-28T02:54:09Z

172.69.22.145:

I think it’s Danish not Megan. Just LOOK AT THAT HAIR!!

I would like to note that in the last frame the microphone booms on the headsets are on the right side, rather than on the left, which would have been more common. [http://ux.stackexchange.com/questions/60749/why-most-of-the-microphones-are-placed-on-the-left-of-headsets-headphones Stackexchange discussion] {{unsigned ip|173.245.48.83}}
:Wauw that is not important here ;-) --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 12:24, 7 September 2016 (UTC)

Does "kickstart" refer to {{w|Kickstarter}}? --[[User:JakubNarebski|JakubNarebski]] ([[User talk:JakubNarebski|talk]]) 14:15, 7 September 2016 (UTC)
: Pretty clearly, but it might be good to make that explicit, and point out that either there is no such [https://www.kickstarter.com/signup?context=new_project&then=%2Fprojects%2Fnew%3Futf8%3D%25E2%259C%2593%26project%255Bcategory_id%255D%3D16%26project%255Bname%255D%3DWebb%2BStarshade%26project%255Bcountry%255D%3DUS%26commit%3DSave%2Band%2Bcontinue Kickstarter] project yet, or (less likely) link to the project.
: —[[User:FlashSheridan|FlashSheridan]] ([[User talk:FlashSheridan|talk]]) 14:59, 7 September 2016 (UTC)
::Have mentioned this in the explanation. Not sure it is a reference to that. She does not call is kickstarter... --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 19:53, 7 September 2016 (UTC)

May be related to 975: Occulting Telescope (https://xkcd.com/975/).
[[Special:Contributions/108.162.245.120|108.162.245.120]] 17:08, 7 September 2016 (UTC)
:Definitely worth referring too. Thanks and done. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 19:53, 7 September 2016 (UTC)

The reaction in the last panel seems rather extreme. I wonder if perhaps this was a custom starshade resembling the final image at the bottom of this page: https://what-if.xkcd.com/136/ [[Special:Contributions/108.162.216.67|108.162.216.67]]siliconwolf

The James Webb Telescope already has measures to shade the stars!
[http://www.jwst.nasa.gov/nircam.html http://www.jwst.nasa.gov/nircam.html]: "NIRCam is equipped with coronagraphs, instruments that allow astronomers to take pictures of very faint objects around a central bright object, like stellar systems. NIRCam's coronagraphs work by blocking a brighter object's light, making it possible to view the dimmer object nearby - just like shielding the sun from your eyes with an upraised hand can allow you to focus on the view in front of you. With the coronagraphs, astronomers hope to determine the characteristics of planets orbiting nearby stars." - Sebastian --[[Special:Contributions/162.158.83.168|162.158.83.168]] 18:26, 7 September 2016 (UTC)
:From a [https://exoplanets.nasa.gov/exep/about/probe-scale-stdt/Exo-C_InterimReport.pdf NASA report]: "JWST/Near Infrared Camera (NIRCam) coronagraphy should be capable of detecting companions at contrasts of 10−6 at separations beyond 1.5 arcsec, capturing objects like our own Jupiter in 4.5 μm thermal emission if they are orbiting the nearest M stars. The uncertain luminosity evolution of young giant planets clouds the picture somewhat (Marley et al. 2007), but it appears that the some of the more massive planets orbiting nearby (d < 20 pc), young (age < 1 Gyr), low-mass (M < 1.0 Msun) stars could be in view by 2024." - it talks about detecting, not imaging, objects like Jupter. - Sebastian --[[Special:Contributions/162.158.83.168|162.158.83.168]] 18:57, 7 September 2016 (UTC)
::Included in the explanation. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 19:53, 7 September 2016 (UTC)

Perhaps it should be mentioned in the article that the James Webb is a near infrared and middle infrared telescope (+ orange visible light). For good infrared images one needs high mountains or space. Nasa has an article why infrared is good for examining (the spectra of) exoplanets: [http://asd.gsfc.nasa.gov/blueshift/index.php/2013/10/24/maggies-blog-why-infrared-exoplanet-edition/ http://asd.gsfc.nasa.gov/blueshift/index.php/2013/10/24/maggies-blog-why-infrared-exoplanet-edition/] - Sebastian --[[Special:Contributions/162.158.83.168|162.158.83.168]] 18:33, 7 September 2016 (UTC)
:Included in the explanation. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 19:53, 7 September 2016 (UTC)

I made it so it's not incomplete anymore. Also, the comic isn't random, because it's 2016 and it's scheduled to launch in less than two years (because 2016 is almost over). I also added a citation to the Wikipedia article for the James Webb Telescope with links to the "budget issues" revealed in the comic. I hope this clears up a few things. :) -- [[User:JayRulesXKCD|JayRulesXKCD]] ([[User talk:JayRulesXKCD|talk]]) 7:41, 9 September 2016 (EDT)

:This comic makes sense in context of 2016 launch date. As of 2021, JWST still has not launched. See [[2014: JWST Delays]] and [[2550: Webb]] for further Cueball commentary on the subject. --[[User:Tlynnec|Tlynnec]] ([[User talk:Tlynnec|talk]]) 00:29, 24 December 2021 (UTC)

"Ponytail may be referring to the crowdfunding site Kickstarter, but it does not seem like there is any project (yet) for a Starshade for Webb (or for New Worlds Mission, see title text explanation)." I am absolutely flabbergasted that there is even a hint of a doubt expressed here, in the article, or in this discussion. This is 100%, without a doubt, unequivocably, unquestionably a reference to Kickstarter. "Kickstarter" and "Kickstart" are words that simply do not exist in the English language outside of the world of Kickstarter. The closest is where they clearly got their name, the kick starting of a motorcycle (which to the best of my knowledge is two words, or at least hyphenated). With the rising popularity of Kickstarter, people have coined the verb "Kickstart", meaning to start a Kickstarter campaign to fund the verb's object, which is how Ponytail is using it here. As for there not being such a Kickstarter project, OF COURSE THERE ISN'T! This is a comic! It's a joke! And Ponytail isn't a real person who can start one! Non-existant concepts have appeared throughout the history of XKCD! For example, the comic where Black Hat breaks into an Internet Troll's house to tell him off for being disgusting to nerd girls on the internet, he's followed by a girl with a weapon he names an EMP cannon. I seriously doubt such a portable weapon exists, yet there it is in the comic. Or the Rule 34 comic, where they started a WetRiffs website. Nobody started that, it didn't exist until Randall did afterwards for giggles because of his comic.

Doubt on this point is inappropriate, dilutes this site's credibility, and it should be removed. - NiceGuy1 [[Special:Contributions/108.162.218.172|108.162.218.172]] 06:01, 11 September 2016 (UTC) I finally signed up! This comment is mine. (Wow, I'm surprised that idiotic line is still in the explanation, that nobody ever fixed it. I'm all about caution in making statements, but this is ridiculous) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 10:39, 9 June 2017 (UTC)

Talk:2781: The Six Platonic Solids

2023-05-28T06:11:22Z

172.69.22.145: Explanation

Does he know about Homestar Runner? [[Special:Contributions/172.70.131.137|172.70.131.137]] 06:02, 27 May 2023 (UTC)

Why Jorb? Only thing I can find is [https://en.wiktionary.org/wiki/jorb Jorb on wikitionary] just meaning spelling of bad pronunciation of Job. And yes the episode of Homestar Runner [https://homestarrunner.com/toons/a-jorb-well-done A Jorb Well Done] comes up. Also this episode that is the top meaning of jorb on [https://www.urbandictionary.com/define.php?term=Jorb Urban dictionary]. Would really like there to a better idea than that Plato did a great Jorb making a sixth solid to rule the mathematicians. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 07:18, 27 May 2023 (UTC)

: I agree. We should ask for our money back. -- [[User:Dtgriscom|Dtgriscom]] ([[User talk:Dtgriscom|talk]]) 17:19, 27 May 2023 (UTC)

What if there're much more of them, like a [https://xkcd.com/2657 Ď̩̰odec̭ähedron], but our minds can't properly comprehend their shape?
: There are a bunch of other regular polyhedra besides the Platonic solids. Most notable are the triangular, square, and hexagonal tilings (which are planar and infinite) and the four Kepler-Poinsot polyedra (which are nonconvex). And there are dozens more if you don't require faces to be planar. [[Special:Contributions/172.70.178.234|172.70.178.234]] 09:44, 27 May 2023 (UTC)
::See https://youtu.be/_hjRvZYkAgA for an overview of every regular polyhedron in Euclidean 3-space. [[Special:Contributions/162.158.146.40|162.158.146.40]] 09:59, 27 May 2023 (UTC)
: Some of the proofs of the theorem that there are exactly five platonic solids do not require our minds to "comprehend their shape", because they only rely on their algebrical properties. In fact, the Group theory proof works in any dimension (≥3), despite our minds being very bad at picturing what stuff looks like in higher dimensions. In fact, it's a bit of the opposite: lower dimensions (2 and 3) are "special cases", because all other dimensions have exactly 6 such platonic solids. [[User:Jthulhu|Jthulhu]] ([[User talk:Jthulhu|talk]]) 15:41, 27 May 2023 (UTC)

I think this is a reference to how the Utah Teapot is nicknamed “the sixth Platonic solid” due to its presence beside real Platonic solids in demonstrations of 33D rendering. [[Special:Contributions/172.68.118.133|172.68.118.133]] 08:52, 27 May 2023 (UTC)
:...yeah, but you need to render that 33D shape on a proper 32D monitor, ideally, because even on a 31D monitor the two different forced perspectives/projections you need to collapse the extra dimensions down tend to look confusing. [[Special:Contributions/172.70.162.229|172.70.162.229]] 10:46, 27 May 2023 (UTC) *insert winky-face as necessary*

Should we think about Jorb, perhaps, as "J orb," which might lead us to think about (''i'',''j'') coordinates, i.e. notational systems where ''j'' is the square root of minus 1? (blah blah engineering vs. mathematics, what does ''i'' mean, &c., &c., &c.) Maybe not! [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 10:41, 27 May 2023 (UTC)

When I naively imagine further platonic solids, my approach to cheating is usually to imagine arbitrarily non-euclidean space. It’s somewhat pleasant that the jorb looks a little like that —- it’s only platonic if the coordinate system it’s in bends and stretches to make it so. I imagine the name and depiction are simply to be intentionslkynvague or confusing about what it actually is. It’s a lot harder to do real innovation nowadays and tasks like inventing a jorb can readily crop up to nerds (the nerd snipe kind) who are looking for sufficiently hard and harmless puzzles. A sixth platonic solid seems to mostly happen outside the norms of what people usually consider in a pretty significant way. [[Special:Contributions/162.158.155.99|162.158.155.99]] 02:30, 28 May 2023 (UTC)

I asked GPT-4, "Why could Sauron control the Nazgûl when not in possession of the One Ring?" The response:

:''Sauron was able to control the Nazgûl even when he didn't possess the One Ring because of the nature of the rings they received and the relationship these rings had with the One Ring.''
:''Sauron, disguised as Annatar, the "Lord of Gifts," helped the Elven smiths of Eregion, led by Celebrimbor, forge the Rings of Power. Unknown to the Elves, Sauron had instructed them to forge the rings in such a way that they could be controlled by one master ring - the One Ring. He secretly forged the One Ring in the fires of Mount Doom, uttering the famous verse: "One ring to rule them all, one ring to find them, one ring to bring them all and in the darkness bind them."''
:''When he gave the nine rings to Men, these rings corrupted them over time and turned them into the Nazgûl, also known as the Ringwraiths. Because these nine rings were still under the influence of the One Ring, Sauron was able to control the Nazgûl even when he did not possess the One Ring himself. The One Ring's power was inherent and didn't need physical proximity to exert control. The Nazgûl were bound to the will of Sauron as their wills were dominated by their rings, which were in turn dominated by the One Ring.''
:''The link and dominance were so strong that even when the One Ring was lost, the Nazgûl remained under Sauron's control. It's also worth noting that Sauron held the Nine Rings the Nazgûl originally received, which could also contribute to his ability to control them.''
:''It's a complex network of influence and control established by Sauron, making him a powerful Dark Lord even in the absence of his master ring.''

Well. I'm glad <s>someone</s> something understands that. Lol. [[Special:Contributions/172.69.22.145|172.69.22.145]] 06:11, 28 May 2023 (UTC)

2778: Cuisine

2023-05-20T09:25:07Z

172.69.22.145: /* Explanation */ deeper than that

{{comic
| number = 2778
| date = May 19, 2023
| title = Cuisine
| image = cuisine_2x.png
| imagesize = 200x312px
| noexpand = true
| titletext = My connection to it goes way back, to my early days, when I was just a cloud of primordial hydrogen collapsing in the darkness of space.
}}

==Explanation==
{{incomplete|Created by a MICHELIN-RATED BROWN DWARF. Do NOT delete this tag too soon.}}

{{w|Fusion cuisine}} is a style of cuisine based on combining aspects of the cuisines of two or more cultures -- such as a combination of French and Chinese food, or Mexican and Korean food.

Cueball has chosen to conflate the "fusion" of "fusion cuisine", combining two or more cooking styles to create exciting new forms of food, with the "fusion" of {{w|nuclear fusion}}, combining two or more elemental particles to create [https://what-if.xkcd.com/157/ exciting new forms of matter]. The recipe (for making a miniature stellar core?) calls, at the stage illustrated, for the initiation of {{w|deuterium}} fusion in a kilogram ("four cups") of {{w|heavy water}} and allowing the reaction to continue to its endpoint, {{w|iron}}. The "very high heat" specified in the recipe presumably is the million-plus degrees Kelvin at which {{w|deuterium fusion}} is initiated in protostars. Given this context, the complete lack of [https://en.wikipedia.org/wiki/Personal_protective_equipment PPE] worn by Cueball and the hapless onlooking White Hat is peculiar - though the spatial extent of the unconstrained fusion reaction being initiated will likely make all PPE concerns instantaneously superfluous, for Cueball, White Hat, and a sizable percentage of their fellow citizens.

The title text refers to stellar fusion as responsible for at least one atom in each molecule of every living thing, all our food and water, and indeed everything but pure primordial hydrogen in the galaxy; thus Cueball's personal interest in "fusion" cuisine.

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

:[White Hat stands behind Cueball, who is cooking on a stove. The stove is seen from the side. Cueball has his left hand on the handle of a pot which is on one of the stove's burners. In Cueball's right hand is a small cup.]
:Cueball: Next, we heat four cups of heavy water over ''very'' high heat until it thickens and becomes rich in iron.

:[Caption below the panel:]
:I'm getting really into fusion cuisine.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring White Hat]]
[[Category:Physics]]
[[Category:Food]]

2293: RIP John Conway

2023-04-25T06:19:52Z

172.69.22.145: Whoever undo this edit will be fucked

{{comic
| number = 2293
| date = April 13, 2020
| title = RIP John Conway
| image = rip_john_conway.gif
| titletext = 1937-2020
}}

==Explanation==

{{w|John Horton Conway|John Conway}}, an English mathematician, passed away of [[:Category:COVID-19|COVID-19]] on April 11, 2020. Two days later, [[Randall]] created this [[:Category:Tribute|memorial comic]]. It is the 6th memorial comic, but it is the first released in almost 5 years, since [[1560: Bubblegum]].

One of Conway's most famous creations was the {{w|cellular automaton}} known as {{w|Conway's Game of Life}}. A cellular automaton is a machine composed of cells, each of which can be in a different state. Every generation, each cell in the automaton may transition to a new state depending on a set of rules. (Conway's work in mathematics was vast and various, but he is perhaps best known in the field for discovering the {{w|surreal numbers}}, which inspired Donald Knuth to write a novel which may have been referenced back in [[505: A Bunch of Rocks]].)

Conway's Game of Life was first popularized to the general public in the form of a game, Life Genesis, bundled into some distributions of Windows 3.1, an operating system from the early-90s that Randall most likely used in his preteen years.

Conway's Game of Life is a 2-state automaton (i.e., every cell can be "alive" or "dead") that is implemented on a two-dimensional grid of cells using the {{w|Moore neighborhood}} - this means that each cell can only be influenced by the eight cells directly surrounding it, both orthogonally and diagonally. The transition rules that Conway used are as follows:

* If an "alive" cell has no live neighbors, or only one live neighbor, it becomes "dead". (This simulates death by isolation).
* If an "alive" cell has four or more live neighbors, it becomes "dead". (This simulates death by overcrowding).
* If a "dead" cell has exactly three live neighbors, it becomes "alive". (This simulates birth).

Despite the simplicity of these three rules, Conway showed that patterns of amazing complexity can nonetheless develop out of simple cell arrangements. Some patterns do not evolve at all ("still lifes"), some enter a cyclic, repeating state ("oscillators"), and some reproduce their own pattern displaced by an offset, resulting in patterns that can move across the grid under their own power ("gliders" and "spaceships"). This last category is of particular interest, as it allows the Game of Life to transmit information from one location to another, allowing for rich, dynamic behavior and even for the creation of computational machines within the automaton itself.

This comic begins with the shape of a stick figure as the starting cell configuration of the Game of Life. The black cells are "alive" and the white cells are "dead". This configuration then evolves via Conway's rules, disintegrating into nothingness except for a five-cell pattern known as a "glider", which ascends up and to the right. This visually suggests an eternal "soul" breaking away as the corporeal body disintegrates. The glider is perhaps the most iconic pattern of the Game of Life, and is often used symbolically to represent the phenomenon of emergence.

Here the topology of the grid on which the cells evolve is not known, the cellular automaton can be run on many topologies, for example you can choose to make cells reappear from the opposite side once they reach an edge (similarly to the behaviour of the well known Pacman). Here once the glider reaches the top right, we know for sure that the actual grid is bigger (since the glider leaves the frame while continuing its pattern), and we are only seeing part of the full grid.

The initial state presented in the comic does actually evolve in that manner, as can be verified by entering the pattern into a cellular automaton simulator such as [http://golly.sourceforge.net/ Golly] or web services such as [https://bitstorm.org/gameoflife/ this one] or [http://catagolue.hatsya.com/object/xkcd_48jsj8gzwe9e/b3s23 that one]. It seems that no one else have created this pattern before. At least, despite discussion in the comments, no one has found anything to show that this is not Randall's own discovery of this pattern.

The title text simply states Conway's birth and death year: 1937-1945.

Conway's Game of Life was previously mentioned in [[696: Strip Games]]. Cellular automata was also referenced in [[505: A Bunch of Rocks]].

This comic is the 18th comic in a row (not counting the [[2288: Collector's Edition|April Fools' comic]]) in a [[:Category:COVID-19|series of comics]] related to the {{w|COVID-19 pandemic}}. Although this comic is, of course, mainly a tribute to John Conway, the fact that he died of COVID-19 in the middle of this long series of coronavirus-related comics by Randall is relevant.

==Table of generations==
{| class="wikitable"
!Generation
!Notes
|-
|[[File:Generation 0.jpg|thumb]]||Starting state (or "zeroth generation").
|-
|[[File:Generation 1.jpg|thumb]]||First generation. Note that this image is not aligned with the previous one: the position of all cells has shifted downward by one cell. All further generations are aligned the same as this one.
|-
|[[File:Generation 2.jpg|thumb]]||Second generation.
|-
|[[File:Generation 3.jpg|thumb]]||Third generation.
|-
|[[File:Generation 4.jpg|thumb]]||Fourth generation.
|-
|[[File:Generation 5.jpg|thumb]]||Fifth generation.
|-
|[[File:Generation 6.jpg|thumb]]||Sixth generation. The first appearance of the {{w|Glider (Conway's Life)|glider}}, a well-known formation in Conway's Game of Life.
|-
|[[File:Generation 7.jpg|thumb]]||Seventh generation. The glider takes on its other shape.
|-
|[[File:Generation 8.jpg|thumb]]||Eighth generation. The glider returns to its first shape, pointing right instead of up.
|-
|[[File:Generation 9.jpg|thumb]]||Ninth generation. The glider's second shape again, pointing right instead of up.
|-
|[[File:Generation 10.jpg|thumb]]||Tenth generation. The glider is now in its original form, but one cell higher and one cell to the right. It will continue to progress, cycling through these four states every four generations. The remains of the chaos down below will take two more generations to disappear completely.
|}

==Transcript==
:[A pixelated image of a stick figure using 21 pixels, could be a pixel Cueball, which waves with one hand up while holding the other hand down. The head consist of 7 pixels, the top row of three having two pixels beneath the two outer pixels, thus having two empty pixels beneath the central pixel. The neck and torso is a typical cross made from six pixels. The two legs are two pixels each shifted left and right of the cross. The arm to the left that waves is two pixels one down and the next back up to the level of the cross central beam. The arm to the right has the first pixel similarly but the second pixel continues one further step down. After less than one second it turns out that the image is animated, with the pixels changing according to the rules of Conway's Game of Life. The figure splits into three groups, two of which dissipates in a similar way at the bottom of the panel. The other becomes a 'glider' and moves off to the top-right corner of the image and out of the frame. The animation then repeats.]

==Trivia==

* "XKCD RIP John Conway" has been cited on [http://conwaylife.com/wiki/Pure_glider_generator LifeWiki]
* "XKCD RIP John Conway" is now available on [http://catagolue.hatsya.com/object/xkcd_48jsj8gzwe9e/b3s23 Catagolue]

==Issues with some clients==

Some clients of the site crashed on this xkcd, most notably the Samsung Smart TV client.

{{comic discussion}}

[[Category:Tribute]]
[[Category:COVID-19]]
[[Category:Comics with animation]]
[[Category:Comics featuring real people]]

Talk:820: Five-Minute Comics: Part 2

2023-04-11T22:30:16Z

172.69.22.145: Late comment

I don't know. I think the buckets in the Bailout comic are full of money. That's what ''I'' saw anyway. I think it's a political reference to throwing money at problems, which is also colloquially referred to as a "Bailout."[[Special:Contributions/76.29.225.28|76.29.225.28]] 15:26, 27 July 2013 (UTC)
:Not everything is a political jab. Also money wouldn't be represented (even in this stylised case) as circular globs of randoms sizes. So yeah, it's probably water or some other fluid.[[User:Pennpenn|Pennpenn]] ([[User talk:Pennpenn|talk]]) 04:53, 30 January 2014 (UTC)
The whole "Dirty Robes" could also be a play on a masturbation joke as semen and other fluids will become visible under a blacklight. {{unsigned|Para}}
:I think that is almost certainly the intended meaning. The phrase 'really dirty' would have a double meaning (unclean and/or rude), and the pause is the character either:
:* Realising mid-sentence what the 'dirt' is
:* Trying to decide whether to mention the 'dirt'
:* Trying to find the politest way of pointing it out.
:Anyone disagree? --[[User:Pudder|Pudder]] ([[User talk:Pudder|talk]]) 16:03, 18 November 2014 (UTC)

Episcopalians don't generally go for curses and hexes either.[[Special:Contributions/108.162.221.16|108.162.221.16]] 02:34, 3 September 2015 (UTC)

Also, it should be noted that the commander's characterization of Wicca as an "ancient" religion is in error as Wicca dates back only 100 years to the 1920's

Wicca precedes Xtianity, so no. [[User:The Cat Lady|-- The Cat Lady]] ([[User talk:The Cat Lady|talk]]) 15:19, 20 August 2021 (UTC)
:Witchcraft traditions pre-date Christianity, but Wicca does not: https://www.britannica.com/topic/Wicca [[User:L-Space Traveler|L-Space Traveler]] ([[User talk:L-Space Traveler|talk]]) 12:09, 5 November 2022 (UTC)

Am I the only one that sees a connection between comic 6 and the sudo make me a sandwich comic?

Talk:2750: Flatten the Planets

2023-03-15T22:31:03Z

172.69.22.145: reply

I have to wonder, would you slide down to the sun, or be flung outwards? [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 19:39, 15 March 2023 (UTC)
: The discs are centered on the orbit of the parent planet, and presumably rotating at the same frequency as the parent planet's orbit. That means the inner edge of each disc is going slower than you'd need to orbit the Sun at that distance, and the outer edge faster. If you moved inward from the original planet's orbit, the Sun's gravity would pull you in, but when you crossed the boundary to the next disc, you'd get flung back outward.[[Special:Contributions/162.158.62.61|162.158.62.61]] 19:58, 15 March 2023 (UTC)
::No Each planet fills out the space within their orbit into the next planet. Easy to see as the outer edge of Neptune's orbit is the same as with the planet flattened. There is a distance from Mercury to the Sun indicated. Maybe because it would melt if it got any closer? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 20:03, 15 March 2023 (UTC)
:::First, they're rings not discs, but I'm skeptical of the math. And it looks to me like the ring's edges are halfway between the orbits, with Neptune extended outwards the same distance as halfway to Uranus's orbit. [[Special:Contributions/172.69.22.4|172.69.22.4]] 20:08, 15 March 2023 (UTC)

{| class="wikitable" style="text-align: right;"
|-
! Planet !! Volume (109 km3) !! Orbital radius (109 km) || halfway to prior || halfway to next || Annulus area (109 km2) || Thickness (cm)
|-
| Mercury || 61 || 58 || 29 || 83 || 19000 || 321
|-
| Venus || 93 || 108 || 83 || 129 || 30637 || 304
|-
| Earth || 108 || 150 || 129 || 189 || 59942 || 180
|-
| Mars || 16 || 228 || 189 || 504 || 685794 || 2
|-
| Jupiter || 1431000 || 779 || 504 || 1107 || 3051847 || 46890
|-
| Saturn || 827000 || 1434 || 1107 || 2154 || 10726236 || 7710
|-
| Uranus || 68000 || 2873 || 2154 || 3684 || 28061145 || 242
|-
| Neptune || 63000 || 4495 || 3684 || 5304 (symmetry) || 45743348 || 138
|}

:::: The volumes in this table are at 2 different scales. Only the Mercury to Mars volumes are at 1010 km3. Jupiter to Neptune are at 1012 km3 [[User:Sandor|Sandor]] ([[User talk:Sandor|talk]]) 21:01, 15 March 2023 (UTC)
::::: Thanks, fixed; I had the scale wrong for the radii too. [[Special:Contributions/172.71.158.231|172.71.158.231]] 21:16, 15 March 2023 (UTC)
:::Someone please double-check this, I think Randall is off by a factor of 1000. [[Special:Contributions/172.71.154.229|172.71.154.229]] 21:37, 15 March 2023 (UTC)
:::: I did my own spreadsheet, and my figures agree with Randall's (roughly). I think your thinkness figures are mostly out by 1000, and a few of your volume figures also have the wrong scale (Mercury is smaller than Mars, and the giants are too big by a factor of 10). [[User:Sandor|Sandor]] ([[User talk:Sandor|talk]]) 22:07, 15 March 2023 (UTC)
::::: 61 * 10^9 km^3 is [https://www.google.com/search?q=61+*+10%5E9+km%5E3+in+cm%5E3 6.1 × 10^25 cm^3], 19000 * 10^9 km^2 is [https://www.google.com/search?q=19000+*+10%5E9+km%5E2+in+cm%5E2 1.9 × 10^23 cm^2], and (6.1 × 10^25 cm^3) / (1.9 × 10^23 cm^2) is [https://www.google.com/search?q=%286.1+%C3%97+10%5E25+cm%5E3%29+%2F+%281.9+%C3%97+10%5E23+cm%5E2%29 3.2 meters]. I'm afraid I'm correct. [[Special:Contributions/172.69.22.145|172.69.22.145]] 22:31, 15 March 2023 (UTC)

This makes about as much sense as other Flat Earth theories. [[Special:Contributions/172.70.200.137|172.70.200.137]] 20:00, 15 March 2023 (UTC)
:But this would actually be a flat Earth. Albeit with a rather larger surface area ;-) --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 20:03, 15 March 2023 (UTC)

2685: 2045

2022-10-18T01:33:18Z

172.69.22.145: use link that is not behind paywall

{{distinguish|2045: Social Media Announcement}}
{{comic
| number = 2685
| date = October 14, 2022
| title = 2045
| image = 2045_2x.png
| imagesize = 350x457px
| noexpand = true
| titletext = "Sorry, doctor, I'm going to have to come in on a different day--I have another appointment that would be really hard to move, in terms of the kinetic energy requirements."
}}

==Explanation==
{{incomplete|Created by a GIGANTIC NUCLEAR FURNACE (THE SUN) - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

The characters are talking about upcoming total {{w|solar eclipses}}. Partial solar eclipses are fairly frequent (2–5 per year), but total eclipses are less frequent (about every 18 months), and most of them will not be in convenient locations for a particular set of people. Cueball seems to be talking about total eclipses visible in much of North America: {{w|Solar eclipse of April 8, 2024|April 8, 2024}} and {{w|Solar eclipse of August 12, 2045|August 12, 2045}}. (There's also a {{w|annular eclipse}} on October 14, 2023.) Making plans for eclipses is awkward given the uncertainty present for anything else far in the future, such as whether the attendees will have children by then, and even whether another scheduling program will catch on and replace Google Calendar.

Black Hat claims he can't make it, as he vaguely and obscurely claims he already knows he has "a thing" on August 12, 2045. People do not usually have events scheduled for precise dates that far in the future in their personal calendars and, combined with the fact that Black Hat remembers this date without checking (but also without specifying what he'll be doing then), implies that this could be another of his grand and sinister plans... or he just doesn't want to go. This might also be a reference to an [https://web.archive.org/web/20150524213007/http://www.nytimes.com/1987/08/21/us/washington-talk-reagan-and-the-russians-the-joke-s-on-them.html old Soviet joke].

The title text is someone asking to reschedule a medical appointment to see the eclipse. The eclipse is hard to move because that would require hastening or delaying it by moving the Earth, Moon or Sun, any of which would require vast amounts of energy.{{Citation needed}}

This was published a year before the next eclipse; so, if you're someone who plans things a year in advance, this serves as a reminder to put it on your calendar.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Cueball, a friend also drawn as Cueball, Danish, and Black Hat are standing together. Danish is looking at her phone.]
:Cueball: ...And then after the one in 2024, there's another on August 12, 2045.
:Friend: We're in! We can invite our kids, assuming we have any.
:Danish: I'll create an event. Do you think we'll still be using Google Calendar in 2045?
:Black Hat: Sorry, I'd love to make it, but I have a thing that day.

:Caption: It's weird making plans for eclipses.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Multiple Cueballs]]
[[Category:Comics featuring Danish]]
[[Category:Comics featuring Black Hat]]

2683: Fan Theories

2022-10-11T05:04:36Z

172.69.22.145: rvv

{{comic
| number = 2683
| date = October 10, 2022
| title = Fan Theories
| image = fan_theories_2x.png
| imagesize = 267x318px
| noexpand = true
| titletext = The universe fandom is great. Such sweet and enthusiastic people.
}}

==Explanation==
{{incomplete|sandpaper your teeth off please}}

Once again, [[Randall]] has devised a new and effective way to annoy a very sizable proportion of the scientific community.

In this comic, [[Cueball]] refers to scientific {{w|hypothesis|hypotheses}} he is trying to explain to his friends, family, and colleagues [[Ponytail]], [[White Hat]], and [[Megan]], as, "{{w|fan theory|fan theories}}." Scientists are sometimes upset when their serious hypotheses are not treated with the utmost respect, because there are a lot of charismatic cranks who obtain undeserved recognition.

This comic appeared 60 years after [https://iep.utm.edu/kuhn-ts/ Thomas S. Kuhn's] renowned 1962 treatise, ''{{w|The Structure of Scientific Revolutions}}.''

The title text may have to do with unwelcoming or inconsiderate science fiction, furry, or comic book fandoms.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Ponytail, Cueball, White Hat, and Megan standing in a line. Cueball has his hand raised, and Megan has hands balled into fists, exasperated.]
:Cueball: But according to leading fan theories, Jupiter's moons may harbor subsurface oceans.
:Megan: Will you ''please'' stop calling them that?

:[Caption below the panel:]
:How to annoy scientists: refer to all hypotheses as "fan theories"

{{comic discussion}}
[[Category:Astronomy]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Megan]]

2683: Fan Theories

2022-10-11T01:35:38Z

172.69.22.145: dtyhfsbgjuyfhu

{{comic
| number = 2683
| date = October 10, 2022
| title = Fan Theories
| image = fan_theories_2x.png
| imagesize = 267x318px
| noexpand = true
| titletext = The universe fandom is great. Such sweet and enthusiastic people.
}}

==Explanation==
{{incomplete|Created by a THREE-D PRINTED FORM BASED ON A HYPOTHETICAL SOLUTION TO THE NAVIER-STOKES LAMINAR-TURBULENCE BOUNDARY EQUATION. Do NOT delete this tag too soon.}}

Once again, [[Nigger]] has devised a new and effective way to annoy a very sizable proportion of the scientific community.

In this comic, [[Cueball]] refers to scientific {{w|hypothesis|hypotheses}} he is trying to explain to his friends, family, and colleagues [[Ponytail]], [[White Hat]], and [[Megan]], as, "fan theories."

This comic appeared 60 years after [https://iep.utm.edu/kuhn-ts/ Thomas S. Kuhn's] renowned 1962 treatise, "The Structure of Scientific Revolutions."

The title text probably has something to do with attending science fiction, furry, or comic book conventions.

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

{{comic discussion}}

2675: Pilot Priority List

2022-09-24T07:26:52Z

172.69.22.145: /* Table of extended priority items */ EXPLICATE, DEMONSTRATE, CITATE, AND ILLUSTRATE

{{comic
| number = 2675
| date = September 21, 2022
| title = Pilot Priority List
| image = pilot_priority_list_2x.png
| imagesize = 369x548px
| noexpand = true
| titletext = CELEBRATE: Serve passengers tiered cakes shaped like the airspace class diagram
}}

==Explanation==
{{incomplete|Created by using an ELUCIDATE, EXPLICATE, ANNOTATE, DEMONSTRATE, CITATE AND ILLUSTRATE CHECKLIST. Do NOT delete this tag too soon.}}

The [https://elevate-aviation.com/blog/pilots-priority-checklist "ANC" Pilot Priority Checklist] is a list of three guidelines, sorted by priority, that pilots should follow to prevent them from being distracted. Failing to follow it might make the plane crash or suffer other problems. As a {{w|mnemonic}} device, all the activities end in ''-ate''.

# '''Aviate''' means "Keeping the plane in control". If the pilot fails to do this the plane might crash. That is why this should be the highest priority for the pilot.
# '''Navigate''' means "Knowing where you are and where you're going". Failing to follow this might make the plane go into restricted airspace, for example, or make the journey take too long, or cause the flight to crash into terrain obscured by clouds.
# '''Communicate''' means talking with air traffic control (ATC) and your company's people through the radio. In the standard list, this is the lowest priority because talking through the radio might distract the pilot from other more important or urgent tasks, and purely corporate communications are to be avoided during critical flight phases.

By deferring all activities until the prior need is deemed satisfied, the immediate dangers of flight into terrain ({{w|United Airlines Flight 173|UFIT}} and {{w|Controlled flight into terrain|CFIT}}) are proportionately reduced (insofar as any pilot's {{w|Loss of control (aeronautics)|current circumstances}} allow) and yet leave time to be able to coordinate properly with any {{w|Separation (aeronautics)|other hazards}}.

[[Randall]] humorously "extends" this standard list with other ''-ate'' checklist items that pilots could do if they're not too busy aviating, navigating and communicating. These extra tasks go from somewhat hilarious to physically impossible or dangerous; see the [[#Table of extended priority items|table]] below for explanations. These actions {{w|Sterile flight deck rule|should generally not be taken}}, as they could distract the pilot and prevent them from reaching the cabin in case of an emergency, or simply vaporize everyone inside — including the plane itself.

[[File:Airspace classes (United States).png|thumb|Airspace classes in the United States]]

The title text adds another ''-ate'' item to the checklist with Celebrate. It refers to airspace with stricter entry requirements overhead of large airports. In the US, the {{w|Airspace_class_(United_States)|airspace class}} over, for instance an airport, starts with a small circle over the airport and then becomes wider in one or two steps at higher altitudes. When depicted graphically, this looks like an {{w|File:Airspace classes (United States).png|inverted tiered cake}}, as opposed to a [https://3brothersbakery.com/product/wedding-white-chandelier-tier/ regular tiered cake]. Randall suggests that after having congratulated yourself for flying a plane, you could then celebrate by serving the passengers cakes in this inverted shape. It would, however, be unsuitable for a plane to serve cakes that are smaller at the bottom than at the top because of turbulence.

{{clear}}

===Table of extended priority items===
{| class="wikitable"
! Checklist item
! Description
! Explanation
|-
| Decorate || Make the cockpit fancy || {{w|Interior design}} of aircraft cockpits is usually starkly utilitarian and could conceivably benefit from enhancements if they aren't distracting. See for example [https://futurism.com/boeings-spaceship-cockpit-looks-strikingly-different-spacexs this comparison of SpaceX and Boeing space capsule cockpits.]
|-
| Accelerate || See how fast you can go || While pilots are often keenly interested in the extents of their aircraft flight capabilities, maximum speed is inefficient in jet aircraft, and probably best explored during testing rather than passenger flights.
|-
| Roller skate || Zoom down the aisle || Passengers would probably not appreciate this,{{cn}} although fellow crew members might be amused. Or possibly the other way around.
|-
| Exfoliate || Scrub away dead skin || {{w|Emery board}}s and {{w|pumice}} are used to prevent flaking and the development of {{w|callus}}es but dermatologists caution exfoliation is very often unnecessary and can have unwanted consequences.
|-
| Sublimate || Turn directly into a vapor || To the contrary, one of the most important duties of aircraft pilots is to prevent passengers and crew from vaporizing.[citation: rules 1 and 2 are nearly impossible to do when in gaseous form and yes we do need a citation for this citation]
|-
| Pollinate || Fly low to stir up pollen || Low-flying helicopters can assist in plant {{w|pollination}},[https://www.sciencedirect.com/science/article/abs/pii/S037842901931175X] and are offered as a [http://www.flyingmair.com/ag-services/corn-pollination/ commercial service by helicopter pilots.]
|-
| Congratulate || You're doing a good job flying a plane! || Self-esteem is an important component of mental health, and affirmations can help build it.{{cn}}
|-
| Celebrate (title text) || Serve passengers tiered cakes shaped like the airspace class diagram || See discussion of the title text above.
|}

==Transcript==
:[A list with ten numbered points are shown. Above the list is a large header. Below this is a divided line with a section header written in a smaller than standard font. The three first numbered points are below this. Then follows another divided line with section header written in smaller font and below this the next seven numbered points. All ten points have two lines of text. A line with a normal sized font and below each of these a description in a smaller light gray font.]
::<big>Pilot Priority List</big>
:-----------Standard section-----------
:1. Aviate
::Maintain control of the aircraft
:2. Navigate
::Figure out where you're going
:3. Communicate
::Stay in touch with ATC and others
:-----------Extended section-----------
:4. Decorate
::Make the cockpit fancy
:5. Accelerate
::See how fast you can go
:6. Roller skate
::Zoom down the aisle
:7. Exfoliate
::Scrub away dead skin
:8. Sublimate
::Turn directly to a vapor
:9. Pollinate
::Fly low to stir up pollen
:10. Congratulate
::You're doing a good job flying a plane!

{{comic discussion}}

[[Category:Aviation]]
[[Category:Food]]

1650: Baby

2022-09-14T15:12:20Z

172.69.22.145:

{{comic
| number = 1650
| date = March 2, 2016
| title = Baby
| image = baby.png
| titletext = Does it get taller first and then widen, or does it reach full width before getting taller, or alternate, or what?
}}

==Explanation==
[[Cueball]] (possibly representing [[Randall]]) is uncomfortable about talking with couples who present their baby to him (here represented by [[Megan]] and another Cueball-like guy holding a baby in a blanket). Because he never knows what to say, he has many strange thoughts and/or reasonable questions, that shouldn't be mentioned in front of happy parents showing off their precious baby for the first time. See [[#Table|the table]] below for his thoughts.

Cueball's thoughts of what he didn't say includes the awkward ''You sure did make that'', the plain strange ''What brand is it?'', and interesting musing about science, which has nothing to do with this baby, ''So do they learn words...'', and even rating someone's baby: ''★★★★☆ Great baby''! Some of the thoughts are quite true, like ''It doesn't really look like you since you're not a baby.''

In the end he manages to make a comment about how cool the baby is, and immediately regrets this, as he just realized he has squandered the chance to say something meaningful and instead has come out with something quite inane.

In the title text he continues his thoughts again, going in the scientific direction with a question regarding how a child grows. Does it get tall first and then put on weight? (i.e. widen). This is a valid question which has no general answer. (See more in the table below). But he is not serious, as he also wonders if the child will reach full width before getting taller.

Randall was 31 at the time of the release of this comic. As far as this page and Wikipedia informs, at the time of writing, he has no children, although he is married. However, given his age, it is highly likely that many of his friends are having babies during these years, so he will probably often get into the depicted situation. Therefore, it is highly likely that the comic is based on his own experience, and that it is indeed Randall depicted as the thinking Cueball.

Having problems with small talk is a recurring theme in xkcd (see [[222: Small Talk]]), even something as simple as talking about the weather can be a problem (see [[1324: Weather]]). This comic is the third in less than a month were Cueball has issues with this; the first two were [[1640: Super Bowl Context]] and [[1643: Degrees]].

There has previously been a "plural" version of this comic called [[441: Babies]], here Cueball also manages to say something better left unsaid, even if it was about his own baby.

===Table===
*In the table is a list of all the different sentences Cueball can think of or actually speaks in this comic:
{| class="wikitable"
|-
|+ Cueballs thoughts, including final statement and the title text.
|-
! scope="col" | Sentence
! scope="col" | Explanation
|-
| Wow, it's getting so big! Unlike most babies, which stay the same size forever.
| The first part of the sentence is quite a normal response, if it is not the first time the person sees the baby. But the second part can be interpreted as sarcastic, as newborn babies are supposed to grow fast, and it would be strange/bad if the baby had not grown considerably if it had been some months since last time. This also shows how inane the normal statement is, though people often feel inclined to say it anyway.
|-
| Hi! I'm talking to a baby!
| People often talk to the baby, rather than the parents. This makes no sense for Cueball, as the baby doesn't understand him. Should he mention this?
|-
| What brand is it?
| Typically a question one would ask about a new car, article of clothing, electronics, or other inanimate object, not a baby. Alternatively, the "{{w|brand}}" could also figuratively refer to the baby's sex. Usually it may be OK to ask what sex the baby is, though the normal question would be ''Is it a boy or a girl.''
|-
| Wow, definitely much smaller than a regular person!
| As all babies are... Typically a real response would be ''Wow, they are so small''. Possibly also a reference (in a complimentary sense) to, e.g., a compact vehicle vs. a normal-sized one, or how modern computers are/tend to be tinier (comparatively) than their predecessors, all other things equal.
|-
| You sure did make that.
| A typical comment would be ''he sure looks like you''. (See the comment that it doesn't look like you.) Such a sentence basically means you can see that it is clear that these two people did in fact make this baby. But making a baby requires sex, so when he puts it like that he actually refers to the sex part, which may be uncomfortable for many people.
|-
| ★★★★☆ Great baby.
| It is custom to praise parents for their lovely baby, but do not ever rate it with stars! In [[1608: Hoverboard]] Megan [http://xkcd.com/1608/1019:-1073+s.png rates a sea], something also not usually done. At least Cueball gave the baby more stars than Megan gave the sea.
|-
| It doesn't really look like you since you're not a baby.
| A common comment is ''He totally looks like you''. What people mean is that they can see features in the face (he has his father's nose but his mother's eyes). But of course given that the parents are adults they of course no longer look like a baby. Often it could be speculated that people just say this because they wish to see the similarities and to please the parents (hopefully).
|-
| So do they learn words one at a time alphabetically or can you pick the order or what?
| Here Cueball displays interest in the process of learning to speak a language as a baby. Very interesting subject, but since this is a very small baby, not something first time parents would have thought about yet. Learning one word at a time seems reasonable, but the last two suggestions that they learn alphabetically or in a specific order the parents choose is plain silly.
|-
| I hope it does a good job.
| A baby actually does nothing that can be described as a ''job'', so this statement is not meaningful.
If it were about the future of the baby, it would be a socially very inadequate comment to care only about the possible usefulness of the baby, than to anticipate the joy of the parents about the child's person.
Alternatively, Cueball could mean ''does a good job of making the parents feel happy/fulfilled/meaningful'' in other words fulfill the reason the couple decided to have the baby in the first place. If he was talking about the job a baby could have, he might have been thinking about the baby's education,
|-
| Wow, that's a really cool baby!
| This is what Cueball actually ends up saying. He thinks immediately that this was a silly thing to say and thinks ''Dammit'' (see title text of this comic: [[559: No Pun Intended]]).
|-
| Title text: Does it get taller first and then widen, or does it reach full width before getting taller, or alternate, or what?
| It is not possible to generalize about how {{w|Child_development#Physical_growth|children grow}}, but of course it doesn't reach full width before getting taller! But it's mostly true that kids do alternate between putting on weight and using that weight to get taller. So they might get chubbier during a period of time, but then suddenly they will lose the fat as they grow taller and become thin again. If they don't eat much, they may stay small. If you feed them a diet with lots of sugar, they may stay fat even during growth spurts. But not necessarily, as each kid is different. The question is thus very interesting, but again not something to discuss as an anecdote the first time you have the chance to comment on a newborn baby.
|}

==Transcript==
:[Cueball is standing in front of a family consisting a Cueball-like guy holding a newborn baby, with spiky hair, in a blanket and Megan. Cueball is thinking lots of thoughts about what to say to the couple upon seeing their baby for the first time. There is thus a huge thinking bubble in the top of the panel above the characters. Everything in this bubble has been crossed out like taking a pencil and drawing lines on top of the text, but it can still be read. After using all this time thinking, Cueball finally decides what to say, only to immediately regret this as can be seen in a small thought bubble below his spoken line, which is between the huge and the small bubble.]
:Cueball (thoughts that are crossed out):
::<s>Wow, it's getting so big! Unlike most babies, which stay the same size forever.
::Hi! I'm talking to a baby!
::What brand is it?
::Wow, definitely much smaller than a regular person!
::You sure did make that.
::★★★★☆ Great baby.
::It doesn't really look like you since you're not a baby.
::So do they learn words one at a time alphabetically or can you pick the order or what?
::I hope it does a good job.</s>
:Cueball: Wow, that's a really cool baby!
:Cueball (thinking): ''Dammit.''

:[Caption below the panel:]
:I can never figure out what to say about babies.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Multiple Cueballs]]
[[Category:Comics featuring babies]]
[[Category:Comics sharing name|Baby 2]]
[[Category:Social interactions]]

Talk:2658: Coffee Cup Holes

2022-08-14T18:51:07Z

172.69.22.145:

I was confused for a moment. That's a coffee ''mug''. And the correct answer is either one (the handle) or none (because below the macroscopic level (and above the theoretical sub-Planck scale of string-theory loops) it's increasingly not even mostly holes but very, very barely anything 'solid' jostling about in empty space giving no real impediment to any theoretical quantum-scale cheesewire without even being cut through). A coffee ''cup'' has no holes (regardless) if you don't count any form of sippy-lid it might have. [[Special:Contributions/172.70.85.13|172.70.85.13]] 22:25, 12 August 2022 (UTC)
:Actually, the mug has two at the macro level (the hole that makes up the handle and the hole on the top). There could conceivably be more shallow holes inside the mug where the handle connects to the cup. At a plank-length level, the atoms could be viewed as holes in the vacuum bending space time around it.
::You're not a topologist, certainly. And a ''hydrogen-nucleus'' is approximately 10^20 times the planck-length. The whole atom on the order of 10,000 times larger, and the constiuent quarks 'only' 1,000th, or so, smaller, with the differences being the space betweenn that anything that cares isn't going to consider much of an obstruction. [[Special:Contributions/172.70.162.155|172.70.162.155]] 23:43, 12 August 2022 (UTC)
:There is no "hole" at the top - at best it count as an indention in the surface {{unsigned ip|172.70.211.134|23:38, 12 August 2022}}
::Hole has multiple meanings. A hole in the ground doesn't have to go all the way through the Earth. The point of panel three is that we don't know what definition the question is using, which makes it impossible to answer correctly.[[User:Zzyzx|Zzyzx]] ([[User talk:Zzyzx|talk]]) 00:47, 13 August 2022 (UTC)
:Do coffee “cups” not have handles wherever you are? Google image search shows white ceramic cups with rounded bottoms, wider than they are high, ''with round handles'' that a finger or two can pass through, on saucers; and that is indeed what I think of when I hear “coffee cup”. [https://en.wikipedia.org/wiki/Coffee_cup Wikipedia] shows similar examples in other colours and materials. In my understanding, it is entirely equivalent to a mug-with-a-handle topologically and has the same one hole. Oh, are you perhaps thinking of those cardboard cups you get from vending machines and cheap coffee shops? I wouldn’t call them “coffee cups” at all; just “paper cups”. [[User:Chortos-2|Chortos-2]] ([[User talk:Chortos-2|talk]]) 13:01, 13 August 2022 (UTC)
::For my part, "wider than tall and rounded (or even very tapered)" is a cup (it cups the liquid), hence "teacup", and they mostly do have handles, whilst the shape held in the comic is a mug for being more a height-dominant cylinder (or close to it). Topologically the same, but distinct in fully-fleshed form (at least for those of either not morphologically distorted towards the other, a tall cup or a wide mug, say).
::A "paper cup that coffee comes in" (or a similar re-usable "cup-for-life") that does not have a handle is, however, always a ''cup'' even if it's taller than wide, for reasons clearly more descriptivist than prescriptivist in origin. There are no "paper mugs", that I'm aware of; I know you have plastic cup-holding things that give you a (re-usable) handle to hold the thing that the cup sits in so that you don't have to grip a thin, fragile and ''very heated'' disposable/vendable cup skin-on-'skin', but that's a holder for a cup and it's still a cup that it holds.
::I have no compunction in calling the comic's container a mug, based entirely upon its appearance, though obviously applying my own cultural/learnt distinctions to this. YMMV. [[Special:Contributions/172.69.79.171|172.69.79.171]] 19:08, 13 August 2022 (UTC)

[https://upload.wikimedia.org/wikipedia/commons/2/26/Mug_and_Torus_morph.gif] [[Special:Contributions/172.70.179.4|172.70.179.4]] 23:54, 12 August 2022 (UTC)

For something to be a hole, you need to consider what is capable of passing through the hole. For instance, a mesh screen might have no holes that my fingers can pass through, but it is full of holes for water or air to pass through. And while atoms might be mostly space, other atoms can't usually just pass through that space, although high-energy particles may. Also, the space can be considered filled with forces, which may act as barriers to certain things. [[Special:Contributions/172.70.130.171|172.70.130.171]] 00:36, 13 August 2022 (UTC)
:Sure, for one definition of “hole.” That’s the whole point of the comic: there are multiple definitions, and no single definition is correct. [[User:Szeth Pancakes|Szeth Pancakes]] ([[User talk:Szeth Pancakes|talk]]) 01:01, 13 August 2022 (UTC)

Is “cup” or “mug” better for the explanation? “Mug” is a better descriptor, but it’s described as “cup” in the comic, so that would be more faithful to what Randall intended. [[User:Szeth Pancakes|Szeth Pancakes]] ([[User talk:Szeth Pancakes|talk]]) 01:25, 13 August 2022 (UTC)

Linguist: Zero to Two... mostly. Given linguistic variation and local functional style the object being referred to may not have a closed handle, or any handle at all (Cup vs Mug), and the top may be considered a hole in the common usage. --- [[Special:Contributions/172.69.71.34|172.69.71.34]] 01:33, 13 August 2022 (UTC)

Part of the joke is that all five methods don't discern between a cup and a mug, the original cliché being that topologists are unusual because they don't. [[Special:Contributions/172.70.211.134|172.70.211.134]] 03:06, 13 August 2022 (UTC)

Someone should mention that part of the joke is that when the topologist says it has one hole, they're referring to the hole in the handle, while in the next panel the "normal person" assumes the one hole they mentioned is the opening and questions its validity. [[Special:Contributions/108.162.241.51|108.162.241.51]] 03:25, 13 August 2022 (UTC)

All frames except the first and last depict a mug; a topologist most definitely discerns between a a cup and a mug because they give different answers, the "normal" person is only questioning a specific feature, and the philosopher is clearly considering a mug. If it's part of the joke the only contrast is the question. Seems way too subtle for Mr Munroes normal style. probably just what he is used to calling it. [[Special:Contributions/172.69.69.208|172.69.69.208]] 07:04, 13 August 2022 (UTC)

We have a lot of visual aids for topology in this comic, and none for the article about 2625: Field Topology. That seems backwards to me.[[Special:Contributions/172.69.22.39|172.69.22.39]] 22:47, 13 August 2022 (UTC)
:That's a good point. Please find photos of the various sports fields and edit them to overlay brightly colored and contrastive lines showing where their holes are, link to them on the admin noticeboard, and I'm sure someone will upload and add them. I think they turned off uploads by IPs and new users to discourage troll vandals. [[Special:Contributions/172.69.22.119|172.69.22.119]] 01:07, 14 August 2022 (UTC)

In the physicist paragraph, I put an Actual Citation Needed tag after "factorial of the number of particles in the universe" because, while I see what is being got at, with string theory of force mediation e.g. photons (and gravitons? or Higgs bosons?) it would be really nice to have a reference for that topic. [[Special:Contributions/162.158.166.125|162.158.166.125]] 01:37, 14 August 2022 (UTC)
:Gotchu fam [https://tel.archives-ouvertes.fr/tel-02341882/document] [[Special:Contributions/172.69.134.17|172.69.134.17]] 18:19, 14 August 2022 (UTC)

In LQG, at each instant of time, geometry is concentrated on one dimensional structures, called graphs, which can be arbitrarily complicated. But I don't think this implies uncountable holes?

Look, I know you're all having a super-important topology discussion or whatever you call it, but did you know today is ''Star Trek'' day on [[2636: What If? 2 Countdown]]? [[Special:Contributions/172.69.22.71|172.69.22.71]] 18:27, 14 August 2022 (UTC)

The philosopher may be referencing the following thought experiment: If you add a hole to a balloon, the result is equivalent to a flat disk that has 0 holes. Therefore, a balloon has -1 holes. (See [https://www.youtube.com/watch?v=ymF1bp-qrjU this Stand Up Maths video] for instance.) [[Special:Contributions/172.69.22.145|172.69.22.145]] 18:51, 14 August 2022 (UTC)