explain xkcd - User contributions [en]

859: (

2021-02-26T21:41:07Z

173.245.54.193: (Russia in partticular

{{comic
| number = 859
| date = February 11, 2011
| title = (
| image = (.png
| titletext = Brains aside, I wonder how many poorly-written xkcd.com-parsing scripts will break on this title (or ;;"'<nowiki/>'{<<[' this mouseover text."
}}

== Explanation ==

In programming, punctuation is often used to mark sections of code. Paired punctuation marks must always be matched up with a corresponding closing mark, otherwise a so-called {{w|syntax error}} occurs. The programming language {{w|Lisp_(programming_language)|Lisp}} (also featured in [[224: Lisp]]) is known for large numbers of nested/paired parentheses. Even in literary works intended only for human consumption, the absence of a matching closing parenthesis as appears in this sentence or other "balanced" punctuation sets creates a mental expectation of eventual closure and completion that remains unfulfilled even long after the unmatched mark is encountered.

There is also reference to [[312: With Apologies to Robert Frost]] which could contain the missing parentheses.

It can also be interpreted as a {{w|metaphor}}, which compares the reader with a Lisp {{w|Interpreter (Computing)|interpreter}}. The interpreter looks for the parenthesis until the end of the file, where it eventually halts, and prints out the error. The comic claims that if you read an unmatched parenthesis, you will look for it for the rest of the day too.

It also refers to an awkward feeling when you see something out of place in a piece of literary text (like unmatched parentheses, spellying error or a randomly-plac,ed comma..

Finally, in some countries (Russia in particular they use just parentheses instead of text smileys so that :) turns into ) and :( becomes (. Hence Russians can magically resist the unresolved tension of the comic but may feel a bit sad instead as a side effect.

The title text refers to the same issue as already highlighted in [[327: Exploits of a Mom]]: if your scripts trust external input, you sometimes will be surprised. At the time of this comic, there were quite a few websites that would grab the xkcd comic three times a week and publish them on their own site. This comic likely broke at least some of the websites because of either the unmatched brace or the extra unmatched markup that is in the title text.

==Transcript==
:[Caption inside an oblong panel:]
:(An unmatched left parenthesis creates an unresolved tension that will stay with you all day.

{{comic discussion}}
[[Category:Programming]]

Talk:1516: Win by Induction

2015-04-24T14:13:54Z

173.245.54.193:

In Pokemon games from Gold and up, pokemon are able to hold items, including pokeballs. While in the game, once a pokeball is filled it is no longer available to select as an item, this comic would seem to imply the possible 'inception' scenario of having a pokemon hold an active pokeball (as the games have already shown that a pokeball can go into a pokeball). --[[Special:Contributions/173.245.54.193|173.245.54.193]] 14:13, 24 April 2015 (UTC)

Is the alt text a reference to double-yolkers (eggs with two yolks)? [http://www.bbc.co.uk/news/magazine-16118149 They're only about 1 in every 1000] but it seems like an obvious reference. --[[User:Fenn|Fenn]] ([[User talk:Fenn|talk]]) 08:32, 24 April 2015 (UTC)
:Makes sense to me. I didn't even think of double yolks until you mentioned it here. [[Special:Contributions/173.245.50.89|173.245.50.89]] 09:04, 24 April 2015 (UTC)BK201

The explanation currently says that doubling makes it uncountably infinite. I'm pretty sure that doubling at each step (or every few steps) is still a countable infinite set. Proof here: http://practicaltypography.com/the-infinite-pixel-screen.html (see section "The internet demands a recount", because the first attempt is wrong). We can also prove it using the same argument as when proving that N x N is countable infinite (making zig-zag), but in this case making a breadth-first search of the tree of Pikachus: map 1 to the first Pikachu, map 2 and 3 to the two Pikachus at the second level, map 4, 5, 6, 7 to the four Pikachus at the third level, map (2^(n-1))…((2^n) - 1) to the 2^(n-1) Pikachus at level n. {{unsigned ip|108.162.229.177}}
:Saw this too late. Yes, I agree, and I have fixed it accordingly. --[[User:Stephan Schulz|Stephan Schulz]] ([[User talk:Stephan Schulz|talk]]) 09:28, 24 April 2015 (UTC)
:The problem being that we don't have an exact number for how many steps include double Pikachus. Granted, this is just a problem of practice, not theory. [[Special:Contributions/173.245.50.88|173.245.50.88]] 12:37, 24 April 2015 (UTC)

"infinite, but countable" {Cough.} Someone doesn't understand infinity. Perhaps they meant "enumerable". [[Special:Contributions/108.162.250.155|108.162.250.155]] 09:29, 24 April 2015 (UTC)
:Someone doesn't understand countability. [[Special:Contributions/141.101.89.217|141.101.89.217]] 09:46, 24 April 2015 (UTC)

"The front most Pikachu speaks." Hey, look, it has those little lines to show it's speaking, not the blank white space behind it. Duh. [[Special:Contributions/108.162.250.155|108.162.250.155]] 09:32, 24 April 2015 (UTC)

Looks like Megan is looking at her watch as well. Mention in transcript/explanation? [[User:Fenn|Fenn]] ([[User talk:Fenn|talk]]) 09:34, 24 April 2015 (UTC)
:Are Megan and Cueball supposed to fight each other? It seems like Cueball still has his closed Pokéball in his hands. Is it then Megan's Pokéball that has evolved into all these Pikachu? And is it because she waits for her Pokémon to be ready to fight Cueball, that she checks her watch? I do not know anything about the Pokémon game/world. But it seems to me that some part of this setup is unexplained by the above... --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 11:23, 24 April 2015 (UTC)

Friendly reminder: Grammatically speaking, Pokémon are like sheep or deer. Singular and plural are both written the same. One Pikachu, many Pikachu, all the Pikachu. You'd be surprised at how much rage forgetting this causes in certain corners of the Internet. {{unsigned ip|141.101.99.42}}

What doesn't make sense to me is how this could continue indefinitely – after all, each of those Pikachu must have caught its own Pikachu beforehand. I don't see any infinite loop here, just a bunch of Pikachu that already had one another caught itselves. [[Special:Contributions/141.101.96.217|141.101.96.217]] 10:13, 24 April 2015 (UTC)

The word "induction" could also be intended to have a double meaning, referring also to electromagnetic induction. Pikachu is, after all, and electric pokémon. {{unsigned ip|141.101.105.194}}
:Yes, I think this is right. Something about Maxwell's equations and induction. {{unsigned ip|173.245.54.203}}
::From an engineering standpoint, in my opinion, Pikachu act more like biological capacitors (stored electric charge at potentially high voltage able to deliver large discharge currents) than inductors ("storing" magnetic energy via constant current, able to deliver high voltage when interrupted, like the ignition coil for an older automotive engine). I'm not too familiar with the Pokémon in-game/in-show universe, but I would imagine the Nurse Jenny corps could use electric Pokémon such as Pikachu (or Raichu) like defibrillators for cardiac events! --BigMal // [[Special:Contributions/173.245.50.177|173.245.50.177]] 11:42, 24 April 2015 (UTC)

There's a point floating about how infinity doesn't imply completion. For instance, the number of all even integers is infinite, yet any given integer "only has a 50% chance of being even", so the series is quite obviously incomplete. This article seems to tend towards the idea (in diction) that an infinite number of pikachu would result in a win based on a 'logical' premise, without referring specificially to the terms of it's assumption. [[User:Xerxesbeat|Xerxesbeat]] ([[User talk:Xerxesbeat|talk]]) 11:38, 24 April 2015 (UTC)

What happens if the Pikachu in the ball is recursing - picking himself? That doesn't fit the 30-40 double yolk thing, but would explain an infinite series. Food for thought. Megan is bored, waiting for the fight to start. I thought the game was supposed to begin when the players choose, though, so I don't understand why the wait is happening at all.

I doubt this is an intentional part of the joke, but the strongest Ground-type moves (Earthquake, Precipice Blades, etc.) are multi-target, hitting all foes in a 1v5 situation such as Horde Battles. In theory, a strong enough super effective move from Cueball's lead would still end the battle in one turn. [[Special:Contributions/173.245.56.176|173.245.56.176]] 12:04, 24 April 2015 (UTC)
:Not Land's Wrath, Dig, or Earth Power, which are strong ground-type moves.[[Special:Contributions/173.245.48.126|173.245.48.126]] 13:05, 24 April 2015 (UTC)

I normally get a hearty chuckle out of Randall's graphical musings, but this one had me scratching my head. Fortunately, ExplainXKCD always comes to the rescue! After reading this page, my first thought was: Pokéception! 13:17, 24 April 2015 (UTC)

== Induction ==

Two other possibilities: one, in a bit of googling, it would appear that there is a type of Pokémon evolution called induced evolution, which involves stones of some kind? Alternately, we can use the term induction in the sense of soneone being ''inducted'' into a group. In this case, Megan has trained her Pikachu to be a Pokémaster. (Perhaps by arranging for it to be inducted into a rarified "gym"? I confess, I know nothing about the show.) [[Special:Contributions/173.245.56.196|173.245.56.196]] 13:11, 24 April 2015 (UTC)

I'm surprised no one mentioned that Pokémon is a game a long time before becoming a show. Although it was because of the animated series that Pikachu became "special" among the hundreds of other cute critters.

Also, no mention to the russian matryoshka dolls? Come on...
Closest other xkcd I recall is https://xkcd.com/878/

== Axiom of choice ==

Could this be to do with the {{w|axiom of choice}} from set theory? From my understanding, it's a fundamental axiom of set theory that says 'given a set of sets, it's possible to choose one element from each of those sets'. "Choosing" is in this case a specific operation that can be performed on an element.

One specific detail about the axiom is that all sets under consideration must be nonempty; that is, they must contain at least one element. So I think this is analogous to the situation of a Pokemon trainer owning multiple (full) Pokeballs: his Pokeballs are a collection of non-empty sets from which he is now trying to choose a single element ("Pikachu, I choose you!").

Under ''normal'' circumstances, he can do this without invoking the axiom of choice because he knows the names of all his Pokemon and so can select one from each set. In this case, he could prove his ability to make the choice simply by releasing all of his Pokemon from their balls one at a time. (The Pokemon's name is actually irrelevant, because simply releasing the Pokemon counts as a choice).

However, the situation becomes more complex if it turns out that his Pokemon also possess Pokeballs, because now his ability to make the choice is uncertain. In this situation, there could be ''infinitely many'' Pikachus, and so he can't definitely select a Pikachu from all the Pokeballs under his control. In a situation like this, a mathematician would invoke the axiom of choice.

However, it seems that Cueball is actually having a go at it using an inductive method of choice: first by choosing a Pikachu, then having each Pikachu choose a Pikachu. If the number of Pikachus carrying Pokeballs is finite, then eventually, this will demonstrate that the choice can be made and so the axiom of choice is unnecessary. However, if it's ''infinite'', then this will generate a neverending stream of Pikachus. In the latter case, the game never begins, because you can't begin a Pokemon battle until all participants have chosen Pokemon. Most likely, the other players would simply abandon the game, which Cueball could claim as a victory. [[User:Hawthorn|Hawthorn]] ([[User talk:Hawthorn|talk]]) 13:52, 24 April 2015 (UTC)

Talk:1509: Scenery Cheat Sheet

2015-04-10T16:33:48Z

173.245.54.193:

Wish he added Big Hero 6 for San Francisco. They did a super good job at getting the map accurate to San Francisco. [[Special:Contributions/199.27.133.129|199.27.133.129]] 19:19, 8 April 2015 (UTC)
:But that was set in [http://disney.wikia.com/wiki/San_Fransokyo San Fransokyo]

One objection: although ''What About Bob?'' was set at Lake Winnipesaukee, NH, it was actually filmed at Smith Mountain Lake, VA. {{unsigned|‎Jstech}}

The Napoleon Dynamite Idaho square doesn't cover Preston, where it was filmed.[[Special:Contributions/199.27.133.121|199.27.133.121]] 06:00, 8 April 2015 (UTC)

The ''Twilight/50 Shades'' area really shouldn't cover eastern Washington and Oregon either. East of the Cascade Mountains is much more like Boise than Seattle. [[User:Tribble314|Tribble314]] ([[User talk:Tribble314|talk]]) 07:12, 8 April 2015 (UTC)
:Tribble314 is completely correct

It gets Forest Gump wrong, that is set in Alabama, including the Alabama gulf coast and not easter Georgia, The Tombstone section is on the wrong side of Arizona and Zorro is set, and filmed, in California. Anything By Mark Twain is too far south, and since Road Runner cartoons all have Saguaro and organ pipe cactus, it is amazing how the map outlines the exact part of Arizona where they don't exist {{unsigned ip|173.245.50.122}}
:It's not about where it's set. It's where it's filmed. And I object to the 'Anything by Mark Twain' on the grounds that it's basically just Tom Sawyer/Huck Finn without say Innocents Abroad or for that matter most of what was written by a guy who did a good bit of traveling in his lifetime.--Dude[[Special:Contributions/108.162.237.183|108.162.237.183]] 09:28, 8 April 2015 (UTC)
::No, the map is about where it's set (generally). ''Star Trek'' wasn't actually filmed in Iowa, part of the movie was set there. In any event, the explanation provides a column for each. - Equinox [[Special:Contributions/199.27.128.120|199.27.128.120]] 15:14, 8 April 2015 (UTC)

Let's not forget ''A Connecticut Yankee In King Arthur's Court''! I'm pretty sure that doesn't fit in 'Anything By Mark Twain'-space. --[[User:PsyMar|PsyMar]] ([[User talk:PsyMar|talk]]) 12:46, 8 April 2015 (UTC)

I never even knew I lived so close to so many awesome movies. [[User:YourLifeisaLie|The Goyim speaks]] ([[User talk:YourLifeisaLie|talk]]) 12:39, 8 April 2015 (UTC)

Wikipedia tells me that there are 3 2005 ''War of the Worlds'' movies. So... [[User:YourLifeisaLie|The Goyim speaks]] ([[User talk:YourLifeisaLie|talk]]) 12:43, 8 April 2015 (UTC)

A lot I'd like to argue with, but without proof (no time to look), I'll skip most except for this: The Twin Cities of Minnesota (Minneapolis & St. Paul) are clearly shown (Mpls. skyline at least) in ''Fargo'', yet the Twin Cities area is barely within ''Fargo'''s border. (Nitpick from the movie: the characters are coming FROM the north but the Mpls view is obviously from the south, I-35W Northbound.) Also, ''North Country'', whose story is based around taconite mining in Minnesota's Iron Range (north/northwest of Duluth), should have been included, and also shows a Mpls. skyline as an establishing shot for either lawyer's offices and/or a courthouse. (And one more thing: Thanks to whoever pointed out that Woodstock, IL is the true filming location for ''Groundhog Day''. I would show it on the map with a dot or star there, rather than the Pennsylvania area is supposedly represents.) --BigMal27 // [[Special:Contributions/173.245.50.177|173.245.50.177]] 13:03, 8 April 2015 (UTC)

I think the Oregon Trail section of the map is specifically referring to the video game, because the subtitle below the main text in that map location says "The only part I ever got to." [[Special:Contributions/199.27.128.190|199.27.128.190]] 17:00, 8 April 2015 (UTC)
:That was my assumption too. It's challenging to get to the end of the game, whereas I don't know any reason to not be able to finish the movie. [[User:Smperron|Smperron]] ([[User talk:Smperron|talk]]) 16:41, 9 April 2015 (UTC)

Are we going to have a column for the area the square covers on the map? or a place to record whether or not the area covers the filming location or where it was set? [[Special:Contributions/199.27.133.121|199.27.133.121]] 17:57, 8 April 2015 (UTC)

I think the statement "this is where the movies are set, not where they are filmed" completely misses the point. This is a map of where the movies look like they are set. So, some areas are where they are set (if the movie background seems to be where it's supposed to be) and some areas are where they were filmed (if there's an obvious contradiction between location and setting). Hence, The Sandlot, for example... [[Special:Contributions/173.245.48.188|173.245.48.188]] 18:03, 8 April 2015 (UTC)

Orange is the New Black is a much more convincing setting for Upstate New York, even though it isn't a movie. {{unsigned ip|173.245.56.206}}

For the record, northeast america is a pretty good guess for any Steven King movie. Lots of his stuff is set up there. I know because I am an avid reader. [[User:YourLifeisaLie|The Goyim speaks]] ([[User talk:YourLifeisaLie|talk]]) 04:18, 9 April 2015 (UTC)

I took out the line about 50 Shades being the first fan fiction book to be made into a movie. (The movie Mortal Instruments: City of Bones was a Harry Potter fan fiction.) {{[[Special:Contributions/108.162.237.144|108.162.237.144]] 15:19, 9 April 2015 (UTC)}}

Much (if not most) of True Grit takes place in Oklahoma, so this should at least be Oklahoma/Arkansas {{unsigned ip|173.245.56.173}}

Talk:1500: Upside-Down Map

2015-03-18T14:12:21Z

173.245.54.193:

What's the point? [[Special:Contributions/108.162.249.173|108.162.249.173]] 09:59, 18 March 2015 (UTC)

Australia is still the "right" way up! {{unsigned|Thematkinson}}
:No it is not. But Tasmania stays put as it is an island. Maybe that has caused some confusion? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 10:46, 18 March 2015 (UTC)

"People often say that maps with the south pole at the top will change your perspective." Is this really something that people ''often'' say? I've never heard anyone say it... --[[User:Pudder|Pudder]] ([[User talk:Pudder|talk]]) 10:06, 18 March 2015 (UTC)
:I have heard it... --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 10:46, 18 March 2015 (UTC)

Is perhaps the comic's explanation about a previous map version? The comment about Australia being the normal way is wrong. [[Special:Contributions/108.162.254.80|108.162.254.80]] 10:10, 18 March 2015 (UTC)
:could be - I see Australia as being pivoted just like all the other continents (?)
::Agreed - see my comment above when this was first mentioned here. Now it has been corrected in the explain. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 10:46, 18 March 2015 (UTC)

Should the title text not say South Korea, rather than North Korea? [[Special:Contributions/141.101.106.101|141.101.106.101]] 10:41, 18 March 2015 (UTC)
:Well it is North Korea we have issues with today. But maybe it is not the former South Korea instead...? --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 10:46, 18 March 2015 (UTC)

UK was rotated, Japan was not rotated. Sardinia, Cyprus and other are missing. Hmm... is it a pre-alpha release?
[[Special:Contributions/188.114.103.245|188.114.103.245]] 13:18, 18 March 2015 (UTC)
:Japan sure looks rotated. Maybe it just looks similar upside-down? [[Special:Contributions/108.162.237.180|108.162.237.180]] 13:45, 18 March 2015 (UTC)

The explanation is inaccurate in a few spots in the "jokes" section. Specifically, all the points that say "X is now on the east/west (formerly west/east) of Y" are inaccurate. The whole point is that the spatial relationships of the land masses are unchanged with respect to the cardinal directions. In other words, Cuba is still off the east coast of the US, it's just that Seattle is where Miami used to be.

1448: Question

2014-11-17T10:09:16Z

173.245.54.193: /* Explanation */

{{comic
| number = 1448
| date = November 17, 2014
| title = Question
| image = question.png
| titletext = The universe long dead, Isaac surveyed the formless chaos. At last, he had arrived at an answer. 'I like you,' he declared to the void, 'but I don't LIKE like you.'
}}

==Explanation==
The comic depicts a note to “Isaac”. The note asks Isaac whether Isaac likes the note-writer and asks Isaac to choose either “yes” or “no” as the answer, but Isaac (whose pen is red) has filled in a third answer and selected that one.

Notes of this form – “Do you like me?”, “yes”, “no” are sometimes written by young schoolchildren to each other as a way of gauging or inciting romantic interest. That is, the note-writer is interested in Isaac, or maybe is wondering why Isaac is staring at her so much, and passed him this note to get his answer without the embarrassment of asking face-to-face. Isaac is supposed to check an answer and hand the note back.

The comic is a reference to a short story by Isaac Asimov "[http://www.multivax.com/last_question.html The Last Question]", where humans kept asking successively more complex computers whether entropy can be reversed, and the answer was always "THERE IS AS YET INSUFFICIENT DATA FOR A MEANINGFUL ANSWER". In the end, it figured out the answer, but there were no humans left to give the answer to. No matter, as the demonstration would suffice, and it said "Let there be light!"

==Transcript==
:[A piece of paper.]
:Dear Isaac
:Do you like me?
:□Yes
:□No
:[Written in red.] ☒there is as yet insufficient data for a meaningful answer
{{comic discussion}}

1448: Question

2014-11-17T10:08:29Z

173.245.54.193: /* Explanation */

{{comic
| number = 1448
| date = November 17, 2014
| title = Question
| image = question.png
| titletext = The universe long dead, Isaac surveyed the formless chaos. At last, he had arrived at an answer. 'I like you,' he declared to the void, 'but I don't LIKE like you.'
}}

==Explanation==
The comic depicts a note to “Isaac”. The note asks Isaac whether Isaac likes the note-writer and asks Isaac to choose either “yes” or “no” as the answer, but Isaac (whose pen is red) has filled in a third answer and selected that one.

Notes of this form – “Do you like me?”, “yes”, “no” are sometimes written by young schoolchildren to each other as a way of gauging or inciting romantic interest. That is, the note-writer is interested in Isaac, or maybe is wondering why Isaac is staring at her so much, and passed him this note to get his answer without the embarrassment of asking face-to-face. Isaac is supposed to check an answer and hand the note back.

The comic is a reference to a short story by Isaac Asimov "[http://www.multivax.com/last_question.html The Last Question]", where humans kept asking successively more complex computers whether entropy can be reversed, and the answer was always "THERE IS AS YET INSUFFICIENT DATA FOR A MEANINGFUL ANSWER". In the end, it figured out the answer, but there were no humans left to give the answer to. No matter, as the demonstration would suffice, and it said "Let there be light!"

This comic is likely to be a reference to 'The Last Question' by Isaac Asimov.

==Transcript==
:[A piece of paper.]
:Dear Isaac
:Do you like me?
:□Yes
:□No
:[Written in red.] ☒there is as yet insufficient data for a meaningful answer
{{comic discussion}}