explain xkcd - User contributions [en]

2966: Exam Numbers

2024-07-31T18:41:06Z

172.69.195.64: /* Explanation */ Two questions require *the* 'largest number', but it's a stretch to equate the whole comic with a general study of large numbers (at whatever level of education).

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

==Explanation==
{{incomplete|Created by a MATH TEACHER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

At a kindergarden-level education, it is assumed that an individual might write down a relatively small number{{cn}} like 300, or maybe even 5000. But when people get more education or simply absorb information from pop culture, they get more intuition on how big numbers get, so it is a very complicated problem for a postgraduate student to write a big number. Some example responses to the very last question may include TREE(3), Graham's number, or 3^^^3.

However, it is another problem to write down the number in notation, because mathematical notation is inherently abstract. For example, what is stopping somebody from just writing down "the biggest number + 1"? Is it valid to write a Python program? Some<ref>https://www.youtube.com/watch?v=Mzgw6zMtipQ : Quest To Find The Largest Number
- CodeParade</ref> may argue that the only valid solution is to write down a [https://en.wikipedia.org/wiki/Lambda_calculus Lambda calculus] computation which results in a very big number.

===Pre-Algebra Final Exam===
x = 3x - 8

3x refers to the multiplication of 3 and x. 3x is a convenient shorthand.

By subtracting 3x from both sides, -2x = -8. Divide both sides by -2 to find x=4.

Verify by plugging x=4 into the original equation. 4 = 3*4 - 8 -> 4 = 12 - 8 -> 4 = 4.

===Calculus Final Exam===
Integrate[x Sin[x]^2, {x, 0, Pi}]

Answer: Pi^2/4 or approx 2.4674

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
6 Different math test questions. The first one says: Kindergarten math:Write down the biggest number you can think of
{{comic discussion}}

==References==
<references />

2964: Olympic Sports

2024-07-29T09:03:44Z

172.69.195.64: /* Explanation */

{{comic
| number = 2964
| date = July 26, 2024
| title = Olympic Sports
| image = olympic_sports_2x.png
| imagesize = 553x328px
| noexpand = true
| titletext = Thankfully for everyone involved, the Winter Olympics officials spotted me and managed to stop me before I got to the ski jump.
}}

==Explanation==
{{incomplete|Created by A VERY CONCERNED OLYMPIC OFFICIAL - Provide an explanation of each sport for the convenience of those unfamiliar with some or all listed sports. Do NOT delete this tag too soon.}}

This comic was officially published on the day of the opening ceremony of the {{w|2024 Summer Olympics|2024 Paris (Summer) Olympics}}, though it actually appeared early the following day.

In this comic, [[Randall]], who has no athletic training, imagines himself participating in various Olympic events, with his degrees of failure measured in terms of their humor potential.

{| class="wikitable"
|+ Olympic sports ranked by how funny it would be if a regular person competed
! How funny !! Sport !! Reason !! Depiction
|-
|rowspan=5| Not that funny || {{w|Rowing}} - One or more people row a boat to a destination.|| The person would struggle to row effectively, falling out of cadence and fouling the oars of the other rowers in their boat. However, if Randall competed in the single sculls, such coordination would not be an issue, and he would likely just be much slower than the other competitors. ||
|-
| {{w|Fencing}} - Two contestants attempt to land hits on each other with a long fencing weapon.|| They might fail to land any hits, but it wouldn't be overly humorous. ||
|-
| {{w|Weightlifting}} || They might just fail to lift the weights. ||
|-
| {{w|Golf}} - Contestants attempt to hit, with golf clubs, a golf ball into one or more holes in as small a number of hits as possible.|| They would likely miss the ball or hit poorly. || The illustration depicts Randall missing the hole at very close range.
|-
| {{w|Archery}} - Using a bow and arrow, contestants attempt to hit a target with as much accuracy as possible.|| Arrows might miss the target, but it's not particularly amusing. || Randall misses all his shots on the target.
|-
|rowspan=5| Pretty funny || {{w|Swimming}} - Contestants swim to a destination or complete lengths as fast as possible.|| They might struggle to stay afloat or [https://en.wikipedia.org/wiki/Eric_Moussambani swim awkwardly]. They are also likely to have a markedly different physique to the other competitors. ||
|-
| {{w|Long jump}} - Contestants, with a running start, attempt to jump as far as possible.|| They would likely make a very short jump, or perhaps foul every jump. ||
|-
| {{w|Pole vault}} - Using a bendable pole, contestants attempt to propel (vault) themselves over a bar.|| They would miss the plant and end up dropping the pole and running under the bar. If they did manage to get some lift, but failed to get enough to reach the mat, it would probably be concerning, rather than funny. ||
|-
| {{w|Diving}} - Contestants attempt to fulfil multiple criteria while diving into water.|| Awkward or painful-looking dives could ensue. Potential for injury would be high. ||
|-
| {{w|Hurdles}} - Contestants run on a track with hurdles positioned at various places.|| They might trip and fall over the hurdles, or just knock them all over as they fail to clear them. || Randall repeatedly and painfully runs into the hurdles, unable to jump over any of them. He appears to be holding a hand on his head, possibly covering his eyes or due to having hurt his head.
|-
|rowspan=5| Incredibly funny || {{w|Figure skating}} || They might slip and fall continually on the ice. ||
|-
| {{w|Horizontal bar}} - A horizontal bar is used to perform gymnastics.|| They might fail to perform any flips or fall off the bar. ||
|-
| {{w|Equestrian sports}} - Various activities involving the use of horses.|| They might struggle to control the horse or fall off. || Randall is completely unable to control his horse. He is in the process of falling off and is flailing his arms.
|-
| {{w|Freestyle BMX}} - Contestants ride BMX bikes and perform various tricks, and are then judged by trick quality.|| They might crash or fail to perform tricks. ||
|-
| {{w|Pommel horse}} - Using a gymnastic device somewhat similar to a horse, gymnasts perform various tricks.|| They might awkwardly flop around or fall off. || Randall is attempting to perform a routine but clearly is not very graceful, balanced or typically dynamic, as made apparent by the rather basic agitrons surrounding him.
|}

The title text may be a reference to ski jumper {{w|Vinko Bogataj}}, whose spectacular crash at a (non-Olympic) ski flying event in 1970 in Oberstdorf, (then) West Germany became emblematic of the expression "the agony of defeat" in the opening narration of the popular US television program "{{w|Wide World of Sports (American TV program)|Wide World of Sports}}". Alternatively the reference may be to {{w|Eddie the Eagle}}, whose poor performance at the {{w|1988 Winter Olympics}} led to the introduction of the top 50 or 30% qualifying rule.

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

:[Header above three panels:]
:Olympic Sports ranked by how funny it would be if I, a regular person without athletic training, snuck onto the team to compete:
:[Three panels are shown with a header, a bullet list with five listed sports in each, and one or two depictions of sports.]

:Not that funny
:Rowing
:Fencing
:Weightlifting
:Golf
:Archery
:[Cueball putts a ball with a golf club and misses the hole.]
:[Cueball is aiming with a bow. Three arrows are on the ground at various distances from the target.]

:Pretty funny
:Swimming
:Long jump
:Pole vault
:Diving
:Hurdles
:[Cueball runs stomach-first into a hurdle, while holding a hand on his head. Another hurdle behind him has fallen down.]
:Cueball: [Bonk] Ow! [Bonk] Ow!

:Incredibly funny
:Figure skating
:Horizontal bar
:Equestrian
:BMX freestyle
:Pommel horse
:[Cueball tries to balance himself on a pommel horse. His both hands and one leg are down, while the other leg is slightly raised.]
:Cueball: Look! Look!
:[A horse rider wearing a black helmet is struggling to maintain balance on the running horse, with both hands and one leg raised.]
:Horse rider with black helmet: AAAAA!

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Sport]]

Talk:2393: Presidential Middle Names

2024-07-19T13:56:07Z

172.69.195.64:

I wonder where Hussein comes in in the official rankings. [[User:Orion205|Orion205]] ([[User talk:Orion205|talk]]) 04:16, 3 December 2020 (UTC)
:I got a few of my friends to help me rank all of the presidents' middle names semi-democratically. Hussein came in at 4th. It would have been third if I hadn't exercised my veto powers as official list-writer to give Robinette third place over their objections--[[Special:Contributions/162.158.62.107|162.158.62.107]] 00:32, 5 December 2020 (UTC)

Gamaliel sounds like an Elvish name...[[Special:Contributions/108.162.216.128|108.162.216.128]] 05:03, 3 December 2020 (UTC)
: No, it's a {{w|Gamaliel_Ratsey|highwayman}}. [[Special:Contributions/162.158.155.24|162.158.155.24]] 10:54, 3 December 2020 (UTC)
:I thought it sounds like an angel or daemon name. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 02:14, 4 December 2020 (UTC)

: I would assume his parents were thinking about someone a bit nicer. Perhaps {{w|Gamaliel|Raban Gamaliel}}, a famous Jewish sage, major contributor to the Talmud and Christian saint (in some churches). [[User:Shamino|Shamino]] ([[User talk:Shamino|talk]]) 13:57, 3 December 2020 (UTC)

For the record, this was his paternal grandmother's maiden name. [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 09:18, 3 December 2020 (UTC)

My understanding of the title text is that Hayes was previously in 3rd position, but has been demoted to 4th and no longer appears in the top 3, not that he is at the bottom of the list.[[Special:Contributions/141.101.99.243|141.101.99.243]] 09:39, 3 December 2020 (UTC)
:The title text literally says "The bottom of the list". How can you read that as not meaning "the bottom of the list"??? [[Special:Contributions/141.101.69.153|141.101.69.153]] 10:44, 3 December 2020 (UTC)
::Though I don't read it as this, you ''could'' take it as two separate statements:
::"The bottom of the list remains unchanged." <- there has been no shuffling at the 'worst' end.
::"Poor Rutherford Birchard Hayes." <- alas! For he has been shuffled out of the top three!
::Looking at the entire list of middle names with an arbitrary eye for 'Prettiness', I would definitely put "Birchard" in the bottom half, probably bottom handful, possibly indeed the bottom slot. But then I'd do much the same for "Fitzgerald" too. (That's on a 'prettiest' scale that is pleasant/ugly, not a decorative/plain axis, just so you know. And does contain subjectivities like Werty22's interpretation of "Delano".) [[Special:Contributions/162.158.158.155|162.158.158.155]] 14:27, 3 December 2020 (UTC)
:::The list also literally only includes the top three, so my initial interpretation of the title text was that Hayes was previously in the 2nd position but is now off the list... perhaps due to a re-evaluation of the 'prettiness' of "Birchard". This would leave the bottom of the list (i.e. No. 3) unchanged.
::::I interpret "the list" as being the complete ranking, and he's just showing the top of the leaderboard. Since I think that Burchard could hardly be #4. Too bad this isn't a continuation of a series that he updates every time we elect a new POTUS, so we could see what it actually was previously. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 02:14, 4 December 2020 (UTC)

I think someone needs to do a survey; maybe run a bracket or something, to see if public opinion matches Randall's list. [[User:Angel|Angel]] ([[User talk:Angel|talk]]) 11:33, 3 December 2020 (UTC)
:This is a great idea.

Anyone anything meaningful to add? I think we can remove the incomplete-tag, no? [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 12:21, 3 December 2020 (UTC)
: I "completed" it. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 08:38, 4 December 2020 (UTC)

I just wanted to say that Delano in Spanish sounds like "del ano" which means "from the anus". Not sure that was intended, but it's pretty funny. [[User:Werty22|Werty22]] ([[User talk:Werty22|talk]]) 13:00, 3 December 2020 (UTC)

Does anyone else think Randall's jumping the gun a bit? I mean, I acknowledge that President-Elect Biden becoming President next month is by far more likely than any other scenario, but it still feels wrong to assume it's going to happen. (Also, I believe "Quincy", "Ulysses", and "Baines" should round out the current top five.) [[User:Mathmannix|Mathmannix]] ([[User talk:Mathmannix|talk]]) 13:55, 3 December 2020 (UTC)
:lol [[Special:Contributions/162.158.255.152|162.158.255.152]] 20:00, 3 December 2020 (UTC)
:Since it's not yet 2021, yet the title says "Updated for 2021", I see this as a seeing-into-the-future piece, along one particular timeline. [[User:John.Adriaan|John.Adriaan]] ([[User talk:John.Adriaan|talk]]) 01:56, 4 December 2020 (UTC)

I figured it was important to add Harry Truman, since he does in fact have a middle name, even though it is only one letter long. [[User:Easwaran|Easwaran]] ([[User talk:Easwaran|talk]]) 18:23, 3 December 2020 (UTC)
: That probably makes his the coolest, even if it's not the prettiest. [[User:Shamino|Shamino]] ([[User talk:Shamino|talk]]) 18:30, 3 December 2020 (UTC)
Should this comic be added to the "rankings" category? [[User:Hamjudo|Hamjudo]] ([[User talk:Hamjudo|talk]]) 20:44, 3 December 2020 (UTC)

Just riffing on the idea of middle names. My father, Sam, had no middle name but routinely filled in forms that asked for a middle name with the letter E. He reasoned that made sense since people often called him Sammy, and he could never resist an opportunity to tell a joke. On the other hand, my middle initial is J and my middle name is Jay. Go figure. [[User:Rtanenbaum|Rtanenbaum]] ([[User talk:Rtanenbaum|talk]]) 21:56, 3 December 2020 (UTC)
:My father also had no middle name, but used A whenever a form insisted on needing a middle initial. I don't remember why, and he's not around any more to ask. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 02:14, 4 December 2020 (UTC)
::When working at a particular job where various industry memberships and subscriptions were expected to be partaken of, for 'networking' reasons, I took the opportunity (lacking any 'middle' name) of registering as "Firstname A Lastname", "Firstname B Lastname", etc, per occasion. It was interesting to track and correlate what other unsolicited junk turned up with clear indication of where my details had come from. Mostly as personal entertainment, admitedly. [[Special:Contributions/141.101.98.128|141.101.98.128]] 02:48, 4 December 2020 (UTC)

Surely Bush does not have a middle name, or do we apply the rule for calculating medians and average the two giving Berwal. [[Special:Contributions/141.101.98.96|141.101.98.96]]
:Why would that not be Bertwal? (Although Berwal is prettier.) And wouldn't a single Bush middle name be Walker? That is the middle of the three internal names of the two Presidents Bush. (George Herbert Walker Bush + George Walker Bush => Herbert Walker Walker => Walker)[[User:DaBunny42|DaBunny42]] ([[User talk:DaBunny42|talk]]) 13:08, 4 December 2020 (UTC)

Note to [https://www.explainxkcd.com/wiki/index.php?title=2393:_Presidential_Middle_Names&curid=23607&diff=346711&oldid=345262 this editor], not so much a nickname as a familiarised version of their real name. Unlike such as Richard "Tricky Dicky" Nixon, George "Dubya" Bush (these two examples still ''derived'' from their true full names, but augmented abbreviations) or Andrew "Old Hickory" Jackson, "Bill" Clinton is not really a technical nickname, as wouldn't be "Ronnie" Reagan (less often used than the actual Ronald) or "Jimmy" Carter (actually James Earl Carter Jr., but I ever can't recall him personally maintaining the more formal James... I might just not be old enough). The edit itself seems Ok, to me, but I'm just pedanticly quibbling at its description, in passing. [[Special:Contributions/172.69.195.64|172.69.195.64]] 13:56, 19 July 2024 (UTC)

285: Wikipedian Protester

2024-07-05T12:36:52Z

172.69.195.64: /* Trivia */ Whoops, dove in on the wrong version of the text... ;)

{{comic
| number = 285
| date = July 4, 2007
| title = Wikipedian Protester
| image = wikipedian_protester.png
| titletext = SEMI-PROTECT THE CONSTITUTION
}}

==Explanation==
[[Cueball]] holds up a sign reading "[Citation needed]" during a political speech. The sign text is based on the {{w|Wikipedia:Citation needed|Wikipedia template}} that can be placed next to statements that need citations, (that look like this[citation needed]) usually because of questionable validity. Cueball is using this template to challenge the politician's speech, as political speakers often throw out claims having dubious or no factual basis. This comic was posted on Independence Day in 2007.

The title text represents an alternative sign the protester could be holding. It is a pun on popular phrase "protect the Constitution", which urges politicians to pass and enforce laws in a way that preserves the rules and rights set down by the {{w|Constitution of the United States|U.S. constitution}}. "Semi-protect" is a reference to the {{w|Wikipedia:Semi-protection policy|Wikipedia semi-protection policy}}, which is used to prevent important articles from being edited anonymously or by new users. Semi-protection on an article is shown by displaying this lock [[File:semi-protection-lock.png|12px]] on the top right of an article. Constitutional amendments are proposed by Congress, which isn't anonymous, meaning that in effect, all articles of the Constitution are technically already semi-protected. Funnily enough, the "{{w|Constitution}}" and "{{w|Constitution of the United States}}" articles on Wikipedia are now semi-protected due to excessive vandalism.

==Transcript==
:[A man with dark flat hair is standing at a podium. He is speaking to a crowd while standing behind a lectern. The lectern has a microphone on the top and sports an American flag in color on the side. He holds an arm on the lectern and the other arm is held up in front of him with a finger pointing upwards. There are four red stars on the side of the podium below him and behind him something that could be high curtains. There is an empty gap between the podium and the first people in the crowd followed by a stick with a red top, which indicates a fence to keep the crowd at a distance from the podium. After the fence there is a large crowd of people listening, most of them only partly drawn, only a few has hair. Three signs can be seen above the heads of the crowd, but they are all empty white signs. Except in the middle of the crowd, where Cueball has been raised above the rest of the crowd. He is holding a large sign up over his head in both hands. The sign has a blue text in black square brackets:]
:<big>[Citation needed]</big>

==Trivia==
* The ''[[what if? (blog)|what if?]]'' blog and this wiki use the {{Template|Citation needed}} template as a joke after statements that are blatantly obvious. For example, "The light from the Sun illuminates the Earth.{{Citation needed}}". On this wiki, the template has been used in [[:Category:Pages using the "citation needed" template|{{PAGESINCAT:Pages using the "citation needed" template}} pages]] and clicking on it leads to this comic's explanation.
* Randall {{w|User_talk:Xkcd#http://xkcd.com/c285.html|re-licensed this comic}} under [https://creativecommons.org/licenses/by/2.5/ the CC-BY 2.5 license] so that it could be {{w|File:Webcomic xkcd - Wikipedian protester.png|used on Wikipedia}}. By default, xkcd comics are licensed under [https://creativecommons.org/licenses/by-nc/2.5/ CC-BY-NC 2.5], which is considered too restrictive for Wikimedia content.{{Actual citation needed}} On Wikipedia, this comic was featured as the {{w|Template:POTD/2018-11-23|picture of the day}} on November 23, 2018 and is used in the "{{w|Citation needed}}" article, the "{{w|Wikipedia:Citation needed}}" information page, and the "{{w|Wikipedia:Why Wikipedia cannot claim the Earth is not flat}}" essay.
* The template in this comic used to be [https://web.archive.org/web/20211215010112/https://store.xkcd.com/products/citation-needed-sticker-pack available as a sticker pack] in the xkcd store before it was [[Store|shut down]].
* xkcd fans have made [https://blog.xkcd.com/2007/10/01/the-meetup/comment-page-2/#:~:text=There%20were%20several%20gallant%20protesters%20insisting%20that%20all%20assertions%20be%20fully%20backed%2Dup. "Citation needed" signs in real life] as a joke.

{{comic discussion}}

[[Category:CC-BY-SA comics]]
[[Category:Comics featuring Cueball]]
[[Category:Comics with color]]
[[Category:Comics with xkcd store products]]
[[Category:Multiple Cueballs]]
[[Category:Politics]]
[[Category:Public speaking]]
[[Category:Wikipedia]]

Talk:2954: Bracket Symbols

2024-07-05T12:30:18Z

172.69.195.64:

ummm. How does editing this stuff work. Is this HTML? Why can't we have a gooey? Also, I only sort of get this comic, but it's not that funny.
<marquee behavior="scroll" direction="up">Here is some scrolling text... going up!</marquee>
[[Special:Contributions/172.69.58.102|172.69.58.102]] 05:13, 4 July 2024 (UTC)
: Have a WHAT? - [[Special:Contributions/172.70.179.88|172.70.179.88]] 09:26, 4 July 2024 (UTC)
:: A [https://kirby.fandom.com/wiki/Gooey Gooey]. Although I'm not sure how that would help.[[Special:Contributions/172.70.163.121|172.70.163.121]] 11:27, 4 July 2024 (UTC)
:: I'm sure that should be GUI (Graphical User Interface. --[[Special:Contributions/141.101.69.76|141.101.69.76]] 11:40, 4 July 2024 (UTC)

The "violin" symbols look like an upside-down bag symbol (multiset symbol) to me, moreso than integrals. [[Special:Contributions/172.69.58.135|172.69.58.135]] 18:09, 4 July 2024 (UTC)

Did my best with my first ever contribution - I know there's a chart feature but I cba to relearn html. Feel free to fix it and PLEASE finish my bad explanations. [[User:Qwikster|Qwikster]] ([[User talk:Qwikster|talk]]) 06:05, 4 July 2024 (UTC)

⌊⌋ are floor brackets (and you can now copy-paste them from here into the explanation as needed) [[Special:Contributions/162.158.126.33|162.158.126.33]] 06:03, 4 July 2024 (UTC)

As for the spaghetti, in Python, it'd be a list containing a tuple containing a list containing a set containing an empty tuple. Probably doesn't mean anything specific and pretty much useless), but it *is* legal code [[Special:Contributions/162.158.126.164|162.158.126.164]] 06:05, 4 July 2024 (UTC)

Yay, I figured out how to use a table! [[User:Qwikster|Qwikster]] ([[User talk:Qwikster|talk]]) 06:42, 4 July 2024 (UTC)

I'm British, ex 60+ years and I'm sure I was taught in school to use "for first person speech" and 'for quoting others'. I hadn't even noticed printers doing the opposite. But there again I didn't go to Grammar School. [[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 07:36, 4 July 2024 (UTC)
:: [Update] Researching this issue, using " or ' is acceptable in the UK as long as you are consistent in any work. However, most British authored books I have use '. Then, thought I, Douglas Adams did his own type setting, what did he use? In my box set of HHG2G it's '. But then I found a first (paperback) print run of Dirk Gentley's Holistic Detective Agency... And he used ". I don't think he would have been fickle, so that tells me the ' in British books is a printers' foible. (Controversially, they were responsible for a lot of extra u's being added to 'Latinise' spelling, even in words with Greek or Germanic roots and the replacement of Fall with Autumn) YMMV.[[User:RIIW - Ponder it|RIIW - Ponder it]] ([[User talk:RIIW - Ponder it|talk]]) 10:42, 5 July 2024 (UTC)
::: I remember thinking it was to 'save ink'. After all in a 300 page novel with a lot of "speech", imagine how much savings you might have with 'speech', instead... ;)
::: But I'll accept "printer's foible" (or 'printer"s foible'!) as an answer, given that we were still taught to ''write'' with doubles (and using fountain pens). Pity they couldn't have also refused to print Oxford Commas, though, which are complete waste of space (and, in their case, ink!)... [[Special:Contributions/172.69.195.64|172.69.195.64]] 12:30, 5 July 2024 (UTC)
:I'm British, too, and as I recall my school says sixty years ago, the symbols () are just called brackets and parenthesis is just the grammatical construct in which they can be used. But you can use dashes or even commas to indicate a parenthesis. This has been discussed on such blogs has Ben Yagoda's Not One-off Britishisms. https://notoneoffbritishisms.com/2015/12/15/square-brackets/ --[[Special:Contributions/172.70.90.178|172.70.90.178]] 08:16, 4 July 2024 (UTC)
:Yeah - I don't know where this weird idea that British people use single quotes comes from - it's not my experience. Generally seems to be double quotes for direct speech, and single quotes for paraphrasing, scare quotes, 'jargonisms', etc. I've added to the explanation to reflect that a bit.[[Special:Contributions/172.69.195.176|172.69.195.176]] 11:33, 4 July 2024 (UTC)
::Similar vintage of Brit, here. Always taught to write "66s and 99s" on any primary quotation (you'd '6 and 9' quotes-within-quotes and 66/99 quotes-within-quotes-within-quotes). Except books often seemed to be single(-double(-single))-nesting, always assumed that was the US standard, as they tended to have the likes of "color" and "sulfur", too.
::In typing (typewriter, word processor and on into the internet age) I'd use ""s as my primary, unless it 'wasn't really speech'... essentially scare-quotes, or emphasis. Though in the text-only information age (usenet, etc), I'd use some of the others for /Italics/, *Bold* and _Underline_ purposes.
::For coding purposes, I'd have to use whatever the programming language required (I added the note about Pascal's character/string differentation), except in Perl, where I go for a 'sensible' mix of aesthetics/readability and practicality as I make wide use of the [https://perldoc.perl.org/perlop#Quote-Like-Operators full range of options] available to me, in quotation context, whatever doesn't clash badly with any use of q[array], qq{sub or hash}, qx|binary OR|, =~s/whatever is in my/regexp/, etc... [[Special:Contributions/172.69.194.36|172.69.194.36]] 12:54, 4 July 2024 (UTC)

The integral sign (and its reverse) in the context of string instruments are the so-called 'F-holes', and they're not just decorative elements but help in the instrument(s) resonate more freely. Other shapes exist as well. See [https://en.wikipedia.org/wiki/Sound_hole here] for an in-depth explanation. [[Special:Contributions/172.69.151.27|172.69.151.27]] 09:13, 4 July 2024 (UTC)

「かっこ」[[Special:Contributions/108.162.250.151|108.162.250.151]] 09:24, 4 July 2024 (UTC)

Randall missed an opportunity to reference catamorphisms i.e. banana brackets. There may be some better examples missed as well.

Who is that? [[Special:Contributions/172.68.186.156|172.68.186.156]] 10:05, 4 July 2024 (UTC)

Likely reference to the quote and catchphrase "We can't stop here, this is bat country" from ''Fear and Loathing in Las Vegas''? [[Special:Contributions/162.158.134.242|162.158.134.242]] 11:05, 4 July 2024 (UTC)

The 'violin' quotes may look similar (but not identical) to the S-Shaped bag delimiters (U+27C5 & U+27C6), though these are normally used in the opposite order to enclose multisets.
[[Special:Contributions/172.71.90.10|172.71.90.10]] 13:52, 4 July 2024 (UTC)

The French quotation marks « » are better known as guillemets. They are also used in Spanish, and probably several other written languages. [[Special:Contributions/172.71.142.167|172.71.142.167]] 15:10, 4 July 2024 (UTC)

The single-/double-quotes being recursively embedded with the other reminds me of a short story I once read. It had the form of a tale a person was telling of when he encountered a stranger with a tale of his own. In that tale, the stranger made the aquaintance of a particularly talkative individual. That individual reported the story he heard from a further interlocutor, that story featuring the reminiscences of someone else... ''Which came to a conclusion." ...is the way it ended.' ...and so went that story" ...but of course that was just what was heard.' ...if, of course, you could credit it."'' (It was more layers deep, of course, and with both starting quotes and the paragraph-maintaining standards of opening quotes, which yet still managed to suck you in.) Cannot remember who it was by/what it was called, but obviously the play on the style (a bit more clever than ''just'' "I met a man who said, 'I met a man who said, "I met a man who said, 'I met a man who said "..."'"'") made a big impression on me at the time. [[Special:Contributions/172.70.162.18|172.70.162.18]] 19:51, 4 July 2024 (UTC)

'''"~~ I'm being sarcastic and..."''' The symbol ≈ means approximately equal to. This is much used in some engineering writing. "Output level should be ≈1 Volt." In casual work this may be approximated as "~", or "~~" which is less liable to be confused for a negative sign. {{unsigned|PRR|04:02(+:03), 5 July 2024}}
:It can also be used for such as "~240V", AC power supply, and I use tildes an awful lot in Perl for both regexp operations and bitwise negation (though I also like it as a nicely distinctive choice of delimiter character for joined/split data transportation, at times) . As to the comic text, I sort of associate it with the 'decorated' usernames (akin to Dwarf Fortress 'item quality modifiers', but of course not inspired by such, not sure if they inspired it) along the lines of <code>.~·«wIeRdLyReNdErEdNaMe»·~.</code> [[Special:Contributions/172.70.91.158|172.70.91.158]] 10:21, 5 July 2024 (UTC)

1031: s/keyboard/leopard/

2024-07-05T12:21:48Z

172.69.195.64: /* Sentences */ Filling in and expanding and the like, in many cases (but not all!) with personal experience behind it all. Left the asking about the WIkipedia article as an aside, for when there's more time/someone else to do the job.

{{comic
| number = 1031
| date = March 19, 2012
| title = s/keyboard/leopard/
| image = s keyboard leopard.png
| titletext = Problem Exists Between Leopard And Chair
}}
*Clicking on the image takes you to [http://wiki.xkcd.com/irc/Leopard this link] (now defunct, [https://web.archive.org/web/20190810230906/http://wiki.xkcd.com:80/irc/Leopard archive]).

==Explanation==
{{incomplete|Created by a BOT POSING FOR THE CAMERA IN FRONT OF A LEOPARD - Explain the examples. Do NOT delete this tag too soon.}}

[[Randall|Randall's]] browser looks like {{w|Google Chrome}}, and he has installed at least four extensions on it, which explains the little symbols to the right of the address bar. Extensions are small programs that install into your {{w|Internet browser}} and change the Web pages as you view them. Some make pages easier to read, some remove ads (the third extension is [https://chrome.google.com/webstore/detail/adblock/gighmmpiobklfepjocnamgkkbiglidom AdBlock]) and so on.

For the joke in this comic, an extension accidentally replaces the word "{{w|Computer keyboard|keyboard}}" with "{{w|leopard}}" in a regex (or {{w|regular expression}}). In computing, a regular expression provides a concise and flexible means to "match" (specify and recognize) patterns in text, such as particular characters or words. The command to substitute/replace a string is "s", e.g. "s/old/new/g" replaces any occurrence of "old" with "new". The title therefore contains the command to change "keyboard" into "leopard".

It's not clear what the extension Randall installed was actually supposed to do, but most extensions that revolve around text replacement are humorous in nature (such as [https://chrome.google.com/webstore/detail/cloud-to-butt-plus/apmlngnhgbnjpajelfkmabhkfapgnoai?hl=en Cloud to Butt], which replaces all instances of "[[908: The Cloud|the cloud]]" with "my butt").

The title text references the common IT phrase "Problem Exists Between Keyboard And Chair" or {{w|PEBKAC}}, which means that the problem is caused by the user, not by any failure of the computer. However, due to the substitution, it is now "Problem Exists Between Leopard And Chair".

There has been several [[:Category:Substitutions|comics using substitutions]], both before and after this one.

===Sentences===



; Weird, my leopard just switched to Chinese.
: Sometimes, the keyboard settings may switch to Chinese due to a bug, or by unconsciously making the change. It is quite common for users with non-US keyboard layouts to find they have accidentally switched to the 'default', and conceivably this 'feature' could work the other way. Especially on systems with significant historic Chinese involvement in its [[2166: Stack|development]].
: Leopards are nor known to speak at all, let alone Chinese. Alternately, it refers to a change in diet of {{w|Man-eater|one form}} or {{w|Chinese restaurant|another}}.

; I work with one leopard on my desk and another in the leopard tray.
: Keyboards often take up desk space, and one solution is to have a [https://www.bpfonline.co.uk/search.asp?catid=2737 keyboard tray] that slides from under the desk, or out of the computer cabinet, when needed. This person apparently has two ''separate'' keyboards attached to their system(s), one taking up desk space and the other on the tray. This is probably more convenient than having two keyboards side by side (or on top of each other) on the desktop or two separate 'trays' (or two keyboards somehow jammed into the the same tray), and often a person with such a requirement will have a computer for typical use (with the most accessible keyboard) and a second one only occasional use (with the second keyboard). They could also use a {{w|KVM switch}} for some of the peripherals, but it may not be quite as convenient or as easy to set up as to double up on the keyboards.
: Leopards are traditionally solitary animals outside of mating season, or when a mother is raising her cub(s), and so however practical it is to have two leopards in close proximity, it might be a somewhat necessary compromise to give them each their own area in a given workspace.

; Ever cleaned a leopard? They're filthy.
: Most people will use a keyboard for a long time, rarely replacing them unless they are actually broken, and possibly using old ones with new computers (if not integrated within their system, as with laptops). All this time, general detritus, skin, hair and even scraps of food will accumulate upon and beneath the keys unless cleaned thoroughly. Most people don't try to clean a keyboard ''until'' the accumulated grime starts to make typing a problem with less sensitive (or over sensitive!) keys. If you're finding it necessary to clean a keyboard at all, you will probably find quite a lot of filth to clean off/out.
: Leopards, like most cats, are generally adept at keeping themselves clean. However, as a wild animal they're perhaps considered less 'clean' than one would hope a household or workplace appliance might be, and this would depend upon one's attitude to their grooming by licking themselves all over.

; The iPhone virtual leopard is the fastest IMO.
: The response time of a keyboard is one of the factors that determine its quality, and the ability to rapidly enter characters (words, code, commands). A {{w|virtual keyboard}}, often implemented as a touch-screen 'app', has to integrate into the interface and the speaker here apparently rates the default iPhone type more than others of this kind.
: Real leopards are known to run fast. It is possible that a virtual leopard may be made to exemplify this speed. The makers of the iPhone have possibly made a virtual leopard that is faster than all real leopards, or at least they have made ''their'' virtual leopard faster than all other virtual leopards from all other vendors.

; I rarely email from my phone—I'm so slow when I'm not on a leopard.
: A disadvantage with virtual keyboards is often the lack of {{w|Haptic technology|haptic feedback}}, as well as the compressed and compromised layout required to fit the keys within interface. It is often much easier to use a proper full-sized keyboard, whether you hunt-and-peck or are an accomplished touch-typist, although this may depend a lot on practice.
: In the context of leopards, the individual concerned seems to appreciate the advantages of being on an actual leopard when emailing, as it makes them faster. This could mean faster because the leopard itself is wont to run around. Or perhaps it is because sitting on the back of a leopard (not particularly known for being a patient beast of burden) means you ''have'' to do what you are trying to do much faster, before the consequences being on a (possibly annoyed) leopard literally come back to bite you.

; My leopard died when I spilled tea on it :(
: Keyboards are not generally waterproof, and react badly to any liquid spill upon them. If you are lucky, you can quickly drain them, let them dry and they will not suffer too many ill effects in the long run. But, if the less resiliant electronics get directly affected, it can mean having to replace the now unresponsive keyboard.
: Leopards are animals which eventually die. They are not known to be particularly susceptible to tea, as a substance, although the typically very hot water would not be comfortable and might contribute to the mortality of one in certain circumstances. Either way, it seems like an upsetting experience. ''My leopard' suggests (as with several of the above) that a leopard is being kept as a pet, working animal or perhaps a personal zoo inhabitant, and the loss certainly seems more than if a random leopard were accidentally splashed with a drink.

==Transcript==
:[There are two browser windows open on a computer screen.]
:[The first browser window, taking up most of the screen, but partly blocked by the other window at the bottom, has a Wikipedia article open. The title of the page can be seen on the active tab.]
:Computer leopard - Wikip...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[To the left on the page are standard menus, with lots of unreadable text, except these words:]
:Help
:Go Search
:[The page is not at the top of the article, so the text begins mid sentence, the very top of the letters just cut of in the first visible sentence.]
:which range from pocket-sized leopards to large desktop leopards, the leopard remains the most common user input device. In addition to text entry, specialized leopards are used for computer gaming.
:While many computer interfaces rely on mice or touchscreens, UNIX-style command-line interfaces require users to interact with a leopard.
:[Below is the contents list - the text in the brackets can barely be read. And only the very top of the 2.3 line can be seen, and is thus only a qualified guess at what it was supposed to say, although it fits with the real wiki article.]
:Contents [hide]
:1. History
:2. Leopard types
::2.1 Standard
::2.2 Laptop-sized
::2.3 Thumb-sized
:[To the right there is a picture of a keyboard. The picture text written below:]
:IBM Model M Leopard

:[The second browser window overlapping the first, at the level of the 2.3 menu point in the content menu, is a message board. The title of the page can be seen on the active tab:]
:Discuss - Leopard issu...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[In the window there is a list of topics next to icons of those starting the topic. The top post is just inside the frame, the icon cut of at the very top.]
:[Face of Cueball-like guy on white background:]
:Weird, my leopard just switched to Chinese.
::3 days ago
:[Super close-up of the head of a person with dark hair on black background:]
:I work with one leopard on my desk and another in the leopard tray.
::3 days ago
:[Full picture of a Cueball-like guy, with white background in the bottom half and dark in the upper half (which would conceal any hair on the persons head):]
:Ever cleaned a leopard? They're ''filthy''.
::2 days ago
:[Head of a cat on black background:]
:The iPhone virtual leopard is the fastest IMO.
::19 hours ago
:[Head of a girl with long blond hair on white background:]
:I rarely email from my phone—I'm so slow when I'm not on a leopard.
::11 hours ago
:[Head of Cueball-like guy. A line seems to be going our from his head, but it could just be one of the lines used to fill in the background:]
:My leopard died when I spilled tea on it :(
::2 hours ago

:[Below the main panel of the comic is the following caption:]
:The Internet got 100 times better when, thanks to an extension with a typo'd regex, my browser started replacing the word "keyboard" with "leopard".

==Trivia==
*When first posted, the title was written with lowercase characters, which Randall never uses. This was later changed to small caps.
*The title text could reference [[A-Minus-Minus]], the comic containing the phrase "Instead of office chair, package contained bobcat".


{{comic discussion}}

[[Category:Substitutions]]
[[Category:Comics featuring Cueball]]
[[Category:Multiple Cueballs]]
[[Category:Wikipedia]]
[[Category:Internet]]
[[Category:Language]]
[[Category:Animals]]
[[Category:Regex]]

Talk:2950: Situation

2024-06-27T11:22:59Z

172.69.195.64: Another 'tupo'

For reference, the bridge in question is the Tacoma Narrows Bridge. [[User:Trimeta|Trimeta]] ([[User talk:Trimeta|talk]]) 18:57, 24 June 2024 (UTC)
:Noting that in all cases ''except'' the Tacoma Narrows, the design flaws were but a part of the issue, with operational decisions at the time playing a big part in the designed-in risks becoming reasons for an actual incident. The bridge could never have been "run safely", once built, unlike trying to ignore bunker fires whilst speeding through iceberg-alley or conducting stress tests in parallel with other non-standard procedures or just not refusing to conduct flights under certain weather conditions. Yes, the other things, by skipping the 'bad end' they actually had, would still be susceptible to future incidents (lessons not now having been properly learnt, or even known to be learnable, so still liable to being mishandled).
:But the only thing that could have saved the Tacoma bridge was to have been so much more alert (and less 'amused') by Galloping Gerti and immediately rushed into developing the better analytical models that could lead to an expensive in-situ retrofit (as with the Millenium Bridge, across the Thames, though that didn't have unavoidable wind issues and ''could'' be managed 'at leisure', whilst being made safer). And, without the rather spectacular demonstration of failure, it was probably not on the cards to 'not do nothing', even if it wasn't already too late to avert history in any reasonable way.
:It's human hubris/failings (at various levels) in each case, of course. But operational and design-time errors do more damage in combination than either by themselves. (Case in point, no deaths from the bridge collapse... actually handled pretty well, considering.) [[Special:Contributions/172.70.162.186|172.70.162.186]] 22:00, 24 June 2024 (UTC)

And for the record, the Challenger engineers *did* warn about the O-ring risk, but were overridden by management. [[Special:Contributions/172.68.35.95|172.68.35.95]] 19:25, 24 June 2024 (UTC)

It would have been so easy to draw a dam about to burst just behind the ocean liner {{unsigned ip|172.70.43.54|20:22, 24 June 2024}}
:Any particular dam-burst? There are many, but I'm not sure that we have an 'iconic' one... There's perhaps Taum Sauk, Vajont Dam, Brumadinho dam, El Cobre, Uttarakhand, Dale Dike Reservoir or Derna, picking a selection of notable ones. You couldn't count the deliberate Operation Chastise breaches or the (probably-)deliberate Kakhovka Dam one, nor all those 'nearly a disaster' ones (like Ulley and Toddbrook, two relatively recent concerns in the UK). [[Special:Contributions/172.70.162.186|172.70.162.186]] 22:00, 24 June 2024 (UTC)
::For whatever reason, the first thing that springs to my mind, is the flood scene from Team America World Police. [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 07:02, 25 June 2024 (UTC)
::Johnstown Flood is what came to mind, caused by the South Fork Dam is the most iconic US one, and long enough ago to joke about relative to more recent, larger ones [[Special:Contributions/162.158.159.140|162.158.159.140]] 16:52, 25 June 2024 (UTC)
::Also a huge molasses tank would have been a good reference to one of the worst non-water floods https://en.wikipedia.org/wiki/List_of_non-water_floods [[Special:Contributions/172.70.43.140|172.70.43.140]] 17:07, 25 June 2024 (UTC)

Winds caused by maintenance on a nuclear reactor... What? [[Special:Contributions/172.69.208.173|172.69.208.173]] 22:46, 24 June 2024 (UTC)
:Yeah, this explanation text is reaching, hard. [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 07:00, 25 June 2024 (UTC)

Calling what leaked from the O-ring 'fuel' somewhat understates the issue. The O-ring failure let the SRB rocket exhaust itself burn through and damage the attachment strut and the external tank. [[User:Dkfenger|Dkfenger]] ([[User talk:Dkfenger|talk]]) 23:11, 24 June 2024 (UTC)
:But, rocket fuel can't melt metal struts! ;S [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 06:58, 25 June 2024 (UTC)
::But it can get it hot enough that it then rips apart, causing other failures. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 15:09, 25 June 2024 (UTC)
:::That was sarcasm, silly. ;P [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 18:38, 25 June 2024 (UTC)

I can't help but think that the ship/bridge combination also refers to the Key Bridge collapse, given that MV ''Dali'' just left Baltimore today, passing through the wreckage of the Key Bridge and under a Chesapeake Bay Bridge temporarily closed to traffic. --[[Special:Contributions/172.71.222.92|172.71.222.92]] 03:01, 25 June 2024 (UTC)
:Not shown: Ship electrical system with redundant buses, multiple breaker trips, and all bus ties closed. Not existent: Dolphins and breakers surrounding the piers of a fracture-critical bridge. [[Special:Contributions/172.70.175.84|172.70.175.84]] 03:52, 25 June 2024 (UTC)
:Nothing in the comic implies anything about the Key Bridge. Coincidence of timing, at best. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 15:09, 25 June 2024 (UTC)

I feel like there's potential here, for a Rock-Paper-Scissors-Lizard-Spock kind of game, where each disaster can cause two others & prevent two others. [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 07:07, 25 June 2024 (UTC)

50 comics until 3000! [[user talk:lettherebedarklight|youtu.be/miLcaqq2Zpk]] 04:06, 25 June 2024 (UTC)

In the section labeled "Hydrogen-filled [...] Airship [...]", should we remove the ellipses and show the entire label instead? Is there a good reason for not showing the full label? [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 15:02, 26 June 2024 (UTC)
:I'm going to be bold and change this to the full label. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 15:08, 26 June 2024 (UTC)

I'm going to hazard a conjecture that the reactor kicked off the whole megadisaster when it exploded. The enormous blast from the explosion caused the bridge to collapse. It fell over on the airship and exploded it, and the ocean liner, without its trusty iceberg scout, sank (either on an iceberg or on one of the numerous pieces of wreckage from the bridge or airship). Feel free to use it if it seems plausible. {{unsigned ip|172.69.34.129|20:46, 26 June 2024}}

Why doesn't this page have a "next" button at the top? Or is that only happenning for me? --[[Special:Contributions/172.70.162.186|172.70.162.186]] 09:31, 27 June 2024 (UTC)
:It does for me. But note that the mechanism to give a Next button to every page ''except the very latest'' has been tardy in responding (or being cache-updated, I think was the issue) before. It's possible you saw it before the background whatever-needs-to-be-done was done, but it seems fixed now.
:It's also a possibility that ''your'' local cache is(/was) being tardy (or even some intervening cloud-cache is 'ruining your day'), but if you can see your comment (and this reply) in the "Discussion" footer of the main comic page than I would say you certainly should be getting the updated page in every respect, including the Next-linking button to 2951.
:If you find that it's still ''not'' the case then let us know. If you need to go to the Talk page to even see this, then perhaps we can also help suggest ways to get it moving. But it should still resolve soon enough, I imagine. [[Special:Contributions/172.70.85.6|172.70.85.6]] 11:20, 27 June 2024 (UTC)

Talk:2951: Bad Map Projection: Exterior Kansas

2024-06-27T09:55:16Z

172.69.195.64: /* How would the rest of the world look? */

Seems weird that it's just the contiguous US, with "hints" about what lies within. I hope Randall will release another version with the rest of the world included.[[Special:Contributions/162.158.158.61|162.158.158.61]] 03:20, 27 June 2024 (UTC)

Would the center be both poles ''and'' Kansas's antipode? --[[Special:Contributions/172.68.27.150|172.68.27.150]] 03:58, 27 June 2024 (UTC)

Including Hawaii would have been the cherry on the cake. [[Special:Contributions/198.41.242.174|198.41.242.174]] 05:42, 27 June 2024 (UTC)

: As the center of the map corresponds to Kansas' antipode (Kerguelen in the Indian Ocean https://www.geodatos.net/en/antipodes/united-states/kansas-city), Hawaii isn't really "near the center", but rather to the right of the center (in the direction of the "Pacific Ocean" tag). --[[Special:Contributions/162.158.86.100|162.158.86.100]] 05:58, 27 June 2024 (UTC)

:: Admittedly, I guessed where they would be. [[Special:Contributions/172.71.174.139|172.71.174.139]] 06:09, 27 June 2024 (UTC)

I don't think the middle part is meant to be seen as 'water', just 'out of scope'. [[User:Jaap-Jan|Jaap-Jan]] ([[User talk:Jaap-Jan|talk]]) 07:44, 27 June 2024 (UTC)

== How would the rest of the world look? ==

Currently the center is all water. If I understand correctly the rest of the world could be added, but how would it look? For example, would Europe and Asia cover a good part of the water or would they be tiny specs in the middle (almost making this a world map already)
:My impression (without measuring/replicating) is that this is mathematically (or whatever) a gnomonic projection (which can only show half the world, anyway, even on a sheet stretching up to infinity) radially inverted. As such quite a lot of features that aren't shown ('beyond/within' the 'coastline'/borders) couldn't be, anyway, as more than half the world away. Map-centre would be the compressed singularity of the Great Circle exactly 90° off the 'centre of Kansas' that itself now exists at infinite-radius-every-angle far off the page.
:Though it could just be stereographic with any negatively positioned projection origin. Instead of -1, for gnomonic, with a -2 radii origin you would get the whole surface (at infinity!) in ways that whatever you do to radially invert (probably the direct reciprocal) and otherwise scale (clearly choosing the additional 'zoom level' factor that neatly brings the Kansas border more or less into frame) to compress all offshore/over-border territories into the 'oceanic' centre. Or it could just be a useful rescale of a -2r projection ''of'' the Kansas-antipode, such that all borders of Kansas are pulled into frame.
:(Regarding Hawaii, if quick googling is right about Hawaii being 3,600km from Kansas(-centre?), then that puts it at various preskewed factors towards the 'hemispherical horizon' of ~10,000km or the antipodal point at ~20,000km, before then being further squashed by the particular coordinate conversion system in use. If it's a near-side orthographic projection and, say approaching +1 radii up from the surface-tangent, then it could perhaps be 'over the horizon' in the direct projection and thus 'beyond the singularity' of the inverted-radius version.)
:I'd have to mess with some map data, to be sure the existing features fit either idea of projection (or find the actual one (ab)used), but this'd probably be what I'd do, straight off the bat. And then I could apply it to extraterratorial features, also. I've got some of the necessary data and mungable code handily sitting on a machine that I am ''unhandily'' not going to next use until at least the weekend, and reimplimenting it on this tablet would mean starting from first principles again/testing/etc... ;) [[Special:Contributions/172.70.163.120|172.70.163.120]] 09:23, 27 June 2024 (UTC)

Talk:2951: Bad Map Projection: Exterior Kansas

2024-06-27T09:53:32Z

172.69.195.64: /* How would the rest of the world look? */

Seems weird that it's just the contiguous US, with "hints" about what lies within. I hope Randall will release another version with the rest of the world included.[[Special:Contributions/162.158.158.61|162.158.158.61]] 03:20, 27 June 2024 (UTC)

Would the center be both poles ''and'' Kansas's antipode? --[[Special:Contributions/172.68.27.150|172.68.27.150]] 03:58, 27 June 2024 (UTC)

Including Hawaii would have been the cherry on the cake. [[Special:Contributions/198.41.242.174|198.41.242.174]] 05:42, 27 June 2024 (UTC)

: As the center of the map corresponds to Kansas' antipode (Kerguelen in the Indian Ocean https://www.geodatos.net/en/antipodes/united-states/kansas-city), Hawaii isn't really "near the center", but rather to the right of the center (in the direction of the "Pacific Ocean" tag). --[[Special:Contributions/162.158.86.100|162.158.86.100]] 05:58, 27 June 2024 (UTC)

:: Admittedly, I guessed where they would be. [[Special:Contributions/172.71.174.139|172.71.174.139]] 06:09, 27 June 2024 (UTC)

I don't think the middle part is meant to be seen as 'water', just 'out of scope'. [[User:Jaap-Jan|Jaap-Jan]] ([[User talk:Jaap-Jan|talk]]) 07:44, 27 June 2024 (UTC)

== How would the rest of the world look? ==

Currently the center is all water. If I understand correctly the rest of the world could be added, but how would it look? For example, would Europe and Asia cover a good part of the water or would they be tiny specs in the middle (almost making this a world map already)
:My impression (without measuring/replicating) is that this is mathematically (or whatever) a gnomonic projection (which can only show half the world, anyway, even on a sheet stretching up to infinity) radially inverted. As such quite a lot of features that aren't shown ('beyond/within' the coastline) couldn't be, anyway, as more than half the world away. Map-centre would be the compressed singularity of the Great Circle exactly 90° off the 'centre of Kansas' that itself now exists at infinite-radius-every-angle far off the page.
:Though it could just be stereographic with any negatively positioned projection origin. Instead of -1, for gnomonic, with a -2 radii origin you would get the whole surface (at infinity!) in ways that whatever you do to radially invert (probably the direct reciprocal) and otherwise scale (clearly choosing the additional 'zoom level' factor that neatly brings the Kansas border more or less into frame) to compress all offshore/over-border territories into the 'oceanic' centre. Or it could just be a useful rescale of a -2r projection ''of'' the Kansas-antipode, such that all borders of Kansas are pulled into frame.
:(Regarding Hawaii, if quick googling is right about Hawaii being 3,600km from Kansas(-centre?), then that puts it at various preskewed factors towards the 'hemispherical horizon' of ~10,000km or the antipodal point at ~20,000km, before then being further squashed by the particular coordinate conversion system in use. If it's a near-side orthographic projection and, say approaching +1 radii up from the surface-tangent, then it could perhaps be 'over the horizon' in the direct projection and thus 'beyond the singularity' of the inverted-radius version.)
:I'd have to mess with some map data, to be sure the existing features fit either idea of projection (or find the actual one (ab)used), but this'd probably be what I'd do, straight off the bat. And then I could apply it to extraterratorial features, also. I've got some of the necessary data and mungable code handily sitting on a machine that I am ''unhandily'' not going to next use until at least the weekend, at implimenting it on this tablet would mean starting from first principles again/testing/etc... ;)
[[Special:Contributions/172.70.163.120|172.70.163.120]] 09:23, 27 June 2024 (UTC)

2940: Modes of Transportation

2024-06-03T13:32:53Z

172.69.195.64: /* Explanation */

{{comic
| number = 2940
| date = May 31, 2024
| title = Modes of Transportation
| image = modes_of_transportation_2x.png
| imagesize = 510x518px
| noexpand = true
| titletext = My bold criticism might anger the hot air balloon people, which would be a real concern if any of them lived along a very narrow line directly upwind of me.
}}

==Explanation==
{{incomplete|Created by a Transportationally convenient but insidiously dangerous robotic car - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

Randall's chart compares different modes of transportation by how convenient and dangerous they are. At the top-left (high in convenience and low in danger) are airliners and trains, as these are both fast-moving vehicles on which many millions of dollars have been spent to make them safer. In the top-right, motorcycles are at the same convenience level, but are rated much more dangerous, since they are easy to lose control of at high speeds, and careless drivers (of cars) can easily hit a motorcycle and cause extreme harm. Things like unicycles (bottom-left) are considered much lower on the convenience scale, being not very fast or easy ways to travel, but relatively safe, while towards the centre, skis are apparently moderately convenient and moderately dangerous, since they are relatively easy to fall on if going fast downhill. Way out on their own in the bottom-right, hot air balloons appear to be unique in being rated least on convenience and highest on danger. Presumably, modes of transportation similar to hot air balloons (like zeppelins and blimps) are left off the chart to increase the gap for comedic effect.

Because a hot air balloon is rated so poorly, if an optimization algorithm considers it the optimal mode of transportation, it must be the result of a sign error (e.g. having a minus sign where a plus sign is supposed to be, or vice versa), making the algorithm optimize for the opposite result by mistake. This could be because, unusually, on the y axis of the chart higher is better, whereas on the x axis lower is better. If these were treated the wrong way around, it would result in the air balloon appearing to be the best result. More typically, you might plot convenience vs ''safety'', so that a higher value on either axis would represent a better result. However, both measures are still likely to need to take underlying data (for safety, incident counts, etc.; for convenience, travel time, etc.) and invert them, leading to potential for errors.

In order to compare the relative danger from each mode of transport, one can look at statistics of fatalities and injuries sustained during each activity. Traditionally this can be reported in fatalities/{{w|Killed_or_Seriously_Injured|KSI}} per mile driven or passenger mile (or other unit of distance), to account for the fact that some modes are used much more than others and make valid comparisons. They may also be reported per capita (but this ignores the relative usage of different modes), or per journey (but this doesn't take into account the fact that different modes typically have different journey lengths and times). All of these are somewhat flawed, since they are really measuring the danger ''to'' users of that mode of transport, both from their own conveyance, and from other sources such as other road users. Since ballooning is not a very common mode of transport, hot air balloon incidents are [https://pubmed.ncbi.nlm.nih.gov/9533500/ correspondingly uncommon], and flights are not routinely monitored or registered, it is difficult to draw strong conclusions from the data for hot air balloons.

The title text makes a joke that if a hot air balloon enthusiast disagrees with the ranking and is angered by it, they may wish to remonstrate or retaliate, but will have a difficult time getting to Randall's house with their preferred mode of transportation, because they are limited to travelling in the direction of the wind. If they chose an alternative form of transport, they would be making his point for him. In reality, hot air balloons have some freedom to choose their direction of travel, since by controlling their altitude they can access different wind directions at different heights. Randall should, therefore, be concerned about hot air balloonists who live within a wedge spanned by the various wind directions accessible on a given day. In principle, if the weather conditions are favorable, this could cover every direction from Randall's house. The phrase "hot air balloon people" is reminiscent of "autogyro people" from the title text of [[1972: Autogyros]].

Curiously, the comic includes most common forms of transport, and a number of less common ones, but omits examples such as buses (a mass transit solution arguably more convenient than trains). It is not clear if this is an error, or a deliberate choice to maintain the comic's layout and presentation.

This is the second comic in a row to feature an algorithm.

{| class="wikitable sortable"
|-
! Transportation !! Description !! Convenience !! Danger !! Zone
|-
|{{w|Train}}s
|Mass transit on rails, typically between urban centers.
|data-sort-value=""|Convenient and comfortable, provided proper funding/maintenance and filled timetables. Allows relatively cheap travel for many people at once.
|data-sort-value=""|Exceedingly safe, due to dedicated tracks along a controlled environment. Accidents are largely limited to individuals wandering onto the off-limit tracks.
|Practicality
|-
|{{w|Airliner}}s
|Mass transit by aircraft
|data-sort-value=""| Extremely fast travel between population centers for larger groups of people. Less comfortable and more expensive than trains.
|data-sort-value=""| Extremely safe due to strong regulation and relatively little traffic interactions. However, the few catastrophies that do happen have high death counts.
|Practicality
|-
|{{w|Car}}s
|Motorised road vehicle Most common method of long distance travel, used by many individuals to reach specific destinations
|data-sort-value=""| Owners of a car can usually go easily to any road-accessible location within a 200 mile/300 km radius. Requires constant focus, but can transport a few passengers or some cargo. Parking, maintenance, and infrastructure requirements are often ignored when judging car convenience.
|data-sort-value=""| Insides of cars are covered with safety features, because collisions are relatively common. Assuming appropriate speed limits and proper focus by the driver, accidents can largely be avoided. Driving is the most dangerous thing most people do, and cars are very dangerous to nearby pedestrians and cyclists.
|Practicality
|-
|Scooters
|Either: 
*{{w|Kick scooter}} - Less convenient than the placing would suggest.
*{{w|Scooter (motorcycle)|Low powered motorbike/moped}} - More dangerous than the placing would suggest.
*{{w|Motorized scooter|Engine-powered scooter}} - A middle-ground.
|data-sort-value=""| Kick scooter-style vehicles are probably less convenient than bicycles as they do not provide seating, and are less efficient at converting energy into motion. A low-powered motorbike is about as convenient as a bicycle, requiring refueling in lieu of pedalling, and going much faster.
|data-sort-value=""| Kick scooters are much slower – and therefore safer – than bicycles. A motorized scooter can exceed bicycle speeds, but falling might be slightly safer. Low-powered motorbikes often go much faster than bicycles, and would therefore be much more dangerous. All leave the rider vulnerable to danger from motorised traffic sharing the same space.
|Practicality
|-
|{{w|Bicycle}}s
|Human-powered (or {{w|Electric bicycle|mostly so}}) two-wheeled road vehicle
|data-sort-value=""| Assuming proper road or trail connections, bicycles are highly flexible for traveling to any location within a ~10 km radius, or further.
|data-sort-value=""| Bicycles mostly move slow enough for falls or collisions to have little impact, though they are vulnerable to motorized traffic where it shares the road.
|Practicality
|-
|{{w|Boat}}s
|Watercraft of various types
|data-sort-value=""| Specialized for water traffic, which is a very common form of transportation. Quite comfortable (unless you suffer from seasickness), but usually very slow.
|data-sort-value=""| Sinking, capsizing, or falling overboard, whether by collision or misuse, can be lethal, especially on the sea. However, collisions are very rare.
|Practicality
|-
|{{w|Walking}}
|Personal bipedal ambulation 
|data-sort-value=""| Can travel between any two connected points regardless of infrastructure, but most people only find it comfortable for a few kilometers. Very slow compared to even bicycles, but the energy intensity is good for exercise.
|data-sort-value=""| Most danger to those walking comes from others, such as being hit by a motorized vehicle. Walking up or down stairs is particularly dangerous.
|Practicality
|-
|{{w|Motorcycle}}s
|...
|data-sort-value=""| As practical as cars to move between locations, but generally less comfortable, especially in rough weather.
|data-sort-value=""| Cars with all the safety features of bicycles. Exceedingly dangerous at higher speeds, especially when sharing the road with cars.
|Speciality/Recreational
|-
|{{w|Helicopter}}s
| Rotorcraft in which lift and thrust are supplied by horizontally spinning rotors.
|data-sort-value=""| Effective to move between any two points as long as there are landing pads of reasonable size. Can be used to hover relatively still in the air. Very slow for actual transport, very loud, and very difficult to learn.
|data-sort-value=""| As per {{w|Harry Reasoner}}: "An airplane by its nature wants to fly, and if not interfered with too strongly by unusual events or by a deliberately incompetent pilot, it will fly. A helicopter does not want to fly. It is maintained in the air by a variety of forces and controls working in opposition to each other, and if there is any disturbance in this delicate balance the helicopter stops flying; immediately and disastrously. There is no such thing as a gliding helicopter."
|Speciality/Recreational
|-
|{{w|Light aircraft}}
|In the United States, the general category of [https://www.faa.gov/aircraft/air_cert/design_approvals/small_airplanes/categories small aircraft] covers a variety of aircraft certified to weigh 19,000 pounds (8618 kg) or less at takeoff. Maximum allowed weight varies by specific category.
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Go-kart}}s
|...
|data-sort-value=""| A lack of proper suspension makes for a bumpy ride, and the maximum speed is quite low.
|data-sort-value=""| Crashing is much more likely to cause spinal damage than bicycles, but the relatively low speed would make them much safer than other motorized vehicle options.
|Speciality/Recreational
|-
|{{w|Skateboard}}s
| A board on four wheels
|data-sort-value=""| Much slower and less energy-efficient than bicycles.
|data-sort-value=""| As long as you're not doing mad tricks in a quarterpipe, using a skateboard for transportation carries little risk. Safety gear is common.
|Speciality/Recreational
|-
|{{w|Inline skates|Rollerblades}}
| Shoes with wheels at the bottom
|data-sort-value=""| Much slower and less energy-efficient than bicycles.
|data-sort-value=""| As long as you're not doing mad tricks in a quarterpipe, using rollerblades for transportation carries little risk. Safety gear is common.
|Speciality/Recreational
|-
|{{w|Ski}}s
| Narrow strips of material to stand on while sliding down a hill
|data-sort-value=""| A fine way to move downhill relatively fast, but maintenance of the slope is required. Also a fairly quick way to travel on the flat when there is snow cover that would make other modes of transport challenging. Less useful in less conducive conditions.
|data-sort-value=""|Downhill skiers can reach high speeds at which collisions could cause significant injury to the skier's lightly protected body. It can be hard to control your speed at lower skill levels, but as long as low speeds are maintained (as it might when used as a transportation option), skiing is not that dangerous.
|Speciality/Recreational
|-
|{{w|Unicycle}}s
| One-wheeled human-powered vehicle
|data-sort-value=""|Can be a [https://www.somersetcountygazette.co.uk/news/24351890.wellington-teen-circumnavigates-globe-unicycle/ practical form of transport] for skilled riders. Because unicycles lack a gear system, they are less mechanically efficient than bicycles and have a much lower top-speed.
|data-sort-value=""| Because of the lower top-speed, unicycles would be safer than bicycles, though you may fall off it more frequently.
|Speciality/Recreational
|-
|{{w|Sled}}s
| A construction that can slide over snow, ice, or sand
|data-sort-value=""| Useful in limited conditions in which other forms of transport might struggle to cope with.
|data-sort-value=""| It is hard to properly control your speed downhill, but extremely safe on level terrain or slight slopes.
|Speciality/Recreational
|-
|{{w|Bumper Cars}}
| Small electric karts with rubber bumpers
|data-sort-value=""| Only really convenient for making ''very'' short journeys. Typically require an electronic mesh in the ceiling to move at all.
|data-sort-value=""| Apparently safe enough to be a hardly-supervized children's entertainment attraction.
|Speciality/Recreational
|-
|{{w|Hot Air Balloon}}s
| A basket tied to a huge bag of heated air
|data-sort-value=""| Provide limited control and low speeds. They were the only form of air-travel available in the 19th-century, but were overtaken by powered air-travel.
|data-sort-value=""| A malfunction in the balloon can result in a very rapid descent, from great height. A poorly executed descent could result in a mid-air collision (e.g. with trees, powerlines, etc.) with potential for a nasty fall.
|?????
|}

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

:[A chart is shown, where the Y axis is labeled "Convenient for travel" and has an arrow pointing up and the X axis is labeled "Dangerous" and has an arrow pointing right.]
:[The following modes are shown in the "Zone of practicality" (a large irregular area fitting in to the top left corner of the chart), highlighted with a gray background, starting with the first few bunched at highest convenience, :]
:Trains [very convenient, very safe]
:Airliners
:Cars
:Scooters [the most dangerous of this set, at medium-low danger]
:Bicycles
:Boats [medium-high convenience, a slight amount of danger]
:Walking [the least convienient, at roughly half, and lowest danger of this set]
:[The following modes are shown in the "Zone of specialty and recreational vehicles" (a large irregular swathe from the top right to the bottom left, not quite touching the prior zone), highlighted with a gray background, the nodes spread in rough order from high convenience/danger to low convenience/danger:]
:Motorcycles [highly convenient, nearly maximum danger]
:Helicopters [not quite fully convenient, most danger]
:Light aircraft
:Go karts
:Skateboards
:Rollerblades
:Skis
:Unicycles
:Sleds
:Bumper cars [lowest convenience and lowest danger item]
:[The following is labeled "?????" (in the bottom right corner), and has a gray background all to itself in a small blob notably distant from the nearest other group:]
:Hot air balloons [placed as almost the least convenient and most dangerous, of all labels]

:[Caption below the panel:]
:Hot air balloons are the optimal mode of transportation, if your optimization algorithm has a sign error.

{{comic discussion}}

[[Category:Charts]]

2940: Modes of Transportation

2024-06-03T11:48:16Z

172.69.195.64: /* Explanation */

2940: Modes of Transportation

2024-06-03T09:49:22Z

172.69.195.64: /* Explanation */