<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
		<id>https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=141.101.69.76</id>
		<title>explain xkcd - User contributions [en]</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=141.101.69.76"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php/Special:Contributions/141.101.69.76"/>
		<updated>2026-04-16T15:22:25Z</updated>
		<subtitle>User contributions</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2954:_Bracket_Symbols&amp;diff=345602</id>
		<title>Talk:2954: Bracket Symbols</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2954:_Bracket_Symbols&amp;diff=345602"/>
				<updated>2024-07-04T11:40:17Z</updated>
		
		<summary type="html">&lt;p&gt;141.101.69.76: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
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. &lt;br /&gt;
&amp;lt;marquee behavior=&amp;quot;scroll&amp;quot; direction=&amp;quot;up&amp;quot;&amp;gt;Here is some scrolling text... going up!&amp;lt;/marquee&amp;gt;&lt;br /&gt;
[[Special:Contributions/172.69.58.102|172.69.58.102]] 05:13, 4 July 2024 (UTC)&lt;br /&gt;
: Have a WHAT?  - [[Special:Contributions/172.70.179.88|172.70.179.88]] 09:26, 4 July 2024 (UTC)&lt;br /&gt;
:: 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)&lt;br /&gt;
:: 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)&lt;br /&gt;
&lt;br /&gt;
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)&lt;br /&gt;
&lt;br /&gt;
⌊⌋ 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)&lt;br /&gt;
&lt;br /&gt;
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)&lt;br /&gt;
&lt;br /&gt;
Yay, I figured out how to use a table! [[User:Qwikster|Qwikster]] ([[User talk:Qwikster|talk]]) 06:42, 4 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I'm British, ex 60+ years and I'm sure I was taught in school to use &amp;quot;for first person speech&amp;quot; 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)&lt;br /&gt;
: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)&lt;br /&gt;
: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)&lt;br /&gt;
&lt;br /&gt;
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)&lt;br /&gt;
&lt;br /&gt;
「かっこ」[[Special:Contributions/108.162.250.151|108.162.250.151]] 09:24, 4 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Randall missed an opportunity to reference catamorphisms i.e. banana brackets. There may be some better examples missed as well.&lt;br /&gt;
&lt;br /&gt;
Who is that? [[Special:Contributions/172.68.186.156|172.68.186.156]] 10:05, 4 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Likely reference to the quote and catchphrase &amp;quot;We can't stop here, this is bat country&amp;quot; from ''Fear and Loathing in Las Vegas''? [[Special:Contributions/162.158.134.242|162.158.134.242]] 11:05, 4 July 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>141.101.69.76</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2539:_Flinch&amp;diff=220605</id>
		<title>2539: Flinch</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2539:_Flinch&amp;diff=220605"/>
				<updated>2021-11-09T23:11:08Z</updated>
		
		<summary type="html">&lt;p&gt;141.101.69.76: /* Explanation */ Grammar correction: it's -&amp;gt; its&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2539&lt;br /&gt;
| date      = November 8, 2021&lt;br /&gt;
| title     = Flinch&lt;br /&gt;
| image     = flinch.png&lt;br /&gt;
| titletext = Premed: &amp;quot;Does this count for a physics credit? Can we shorten the string so I can get it done faster? And can we do one where it hits me in the face? I gotta do a thing for first aid training right after.&amp;quot;&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a WOUNDED POSTMED STUDENT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[[Cueball]] is performing [https://youtu.be/4a0FbQdH3dY?t=1518 a common physics demonstration] in which a heavy ball is hung from a rope or cable. The demonstrator, or a volunteer, pulls the ball back until it's close to their face (possibly even touching it), then releases it, allowing it to swing, and then return. Due to conservation of energy, the ball cannot return any further than it's original release point, making it impossible for the person to be struck by it. Because a heavy pendulum will tend to lose little energy on each swing, it will come back very close to its original point, so the experiment creates a conflict between the instinctive desire to escape a heavy object flying at your face, and the theoretical knowledge that it won't harm you. &lt;br /&gt;
&lt;br /&gt;
[[Megan]] is a physicist, who understands the principles of the experiment and claims she won't flinch, confident that it can't harm her.&lt;br /&gt;
&lt;br /&gt;
[[Hairy]] is a biologist, and implies that he has no intention of avoiding the flinch reflex, as he trusts the {{w|Reflex|automatic reflexes}} that the human body has evolved more than he trusts the premise of the experiment. In  both [[755: Interdisciplinary]] and [[1670: Laws of Physics]], the same experiment is referenced. In the title text of the latter [[Randall]] makes a very similar argument as the biologist does here. &lt;br /&gt;
&lt;br /&gt;
[[Ponytail]], an engineer, replies that the doesn't trust Cueball to have hung the pendulum correctly.  Engineers are trained in science, but work with practical applications, and tend to be very aware that practice is rarely as simple as scientific theories might imply. Even if the physical laws are constant, the experiment might not go according to plan. For example, if the cable were to snap or come loose while swinging toward the subject, the ball could strike them in the body, or land on their feet.  If the cable is more elastic than anticipated, it could stretch unpredictably, once again striking someone.  If the anchor point is not stable, it could shift during the experiment, once again causing harm. Also if the ball is not released but pushed, or if the one releasing it leans forward after release they might get hit in the face.&lt;br /&gt;
&lt;br /&gt;
The punch line basically makes the point that failure to trust the safety of an experiment doesn't necessarily imply a lack of scientific knowledge.  If you lack confidence in the design of an experiment, then it's not safe to assume that the laws of physics will protect you.  &lt;br /&gt;
&lt;br /&gt;
The title text shows a pre-med student's response. {{w|Pre-medical}} university courses have a reputation for being more intense and demanding than other undergraduate degrees, so the student is portrayed as being very stressed and time-conscious; showing little interest in the experiment itself, only in how it impacts their degree. &lt;br /&gt;
&lt;br /&gt;
The student first asks if participating in the demonstration will count for a physics credit, implying that they're not willing to spend time on it unless it contributes to their academic requirements. They then ask if they can shorten the string to make the demonstration go faster. Shortening a pendulum does, indeed, cause it to swing faster, but caring about the few seconds this would save is an exaggerated sense of time management. Finally, they ask to do a variant where they ''deliberately'' get struck in the face, because they have a &amp;quot;thing for first aid training&amp;quot; immediately after. This would likely injure them, but the student is apparently willing to sacrifice their own safety and well-being in service to their academic career. It's not clear how this would help, although it could potentially help ''others'' learn first aid by having them practice on the new injury.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Cueball holds a bowling ball in both hands. It is attached to a string that goes behind him and up disappearing off panel around double his height. He is talking to Megan, Hairy, and Ponytail who is looking at him. Between Cueball and the other three is a cross in a dotted circle on the floor.]&lt;br /&gt;
:Cueball: If you stand with the bowling ball in front of your face and let go, will you flinch when it swings back?&lt;br /&gt;
&lt;br /&gt;
:[Zoom in on Megan in a slim panel. There is a caption in a frame above her.]&lt;br /&gt;
:Caption: Physicist&lt;br /&gt;
:Megan: I won't flinch.&lt;br /&gt;
:Megan: I trust conservation of energy.&lt;br /&gt;
&lt;br /&gt;
:[Zoom in on Hairy, in a wide panel. He has lifted arm holding his hand palm up toward Cueball (who is off-panel). There is a caption in a frame above him.]&lt;br /&gt;
:Caption: Biologist&lt;br /&gt;
:Hairy: I trust my flinch reflex, which was honed by millions of years of evolution to protect my delicate face. I'm not messing with it.&lt;br /&gt;
&lt;br /&gt;
:[Zoom in on Ponytail in a slim panel. There is a caption in a frame above her.]&lt;br /&gt;
:Caption: Engineer&lt;br /&gt;
:Ponytail: I don't trust that you hung that thing up correctly.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Megan]]&lt;br /&gt;
[[Category:Comics featuring Hairy]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Physics]]&lt;br /&gt;
[[Category:Biology]]&lt;/div&gt;</summary>
		<author><name>141.101.69.76</name></author>	</entry>

	</feed>