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		<title>explain xkcd - User contributions [en]</title>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2657:_Complex_Vowels&amp;diff=292600</id>
		<title>Talk:2657: Complex Vowels</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2657:_Complex_Vowels&amp;diff=292600"/>
				<updated>2022-08-12T02:24:39Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.214.45: Free QA for the lols&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;
Spoken symbol bears resemblance to 🜏, https://en.wiktionary.org/wiki/%F0%9F%9C%8F&lt;br /&gt;
:Not really, it's closer to 'əG.' [[Special:Contributions/172.69.33.25|172.69.33.25]] 01:15, 11 August 2022 (UTC)&lt;br /&gt;
::Looks like ꬱ to me. Plus some diacritics sprinkled over it, of course. It does look ''similar'' to 🜏 when you include the zalgo. [[Special:Contributions/172.71.98.99|172.71.98.99]] 06:53, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
sscchhwwaa is easy, say it like the x in &amp;quot;fire&amp;quot; and the silent p in &amp;quot;bath&amp;quot;[[Special:Contributions/172.70.85.13|172.70.85.13]] 21:42, 10 August 2022 (UTC)&lt;br /&gt;
:What? There is no 'x' in &amp;quot;fire.&amp;quot; [[Special:Contributions/172.69.33.25|172.69.33.25]] 01:17, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Ideas: bellows-, reed-, and lucite-based voiced phone production tracts typical in science museums; {{w|diphone}}s as an alternative to phomemes (a diphone is the second half of one phoneme followed by the first half of the next -- NOT two adjacent phomemes as the Wikipedia article claims. Two adjacent phomemes are a biphone, not a diphone); the relationship of the position of the tongue in two dimensional place &amp;amp;times; closedeness space to the fundamental and second {{w|formant}} frequencies of speech audio; {{w|diphthong}}s; {{w|Mel-frequency cepstrum|cepstral}} representation such as {{w|MFCC|mel-frequency ceptstral coefficients}}; and {{w|Zalgo text}} IPA. [[Special:Contributions/172.70.206.213|172.70.206.213]] 22:41, 10 August 2022 (UTC)&lt;br /&gt;
: Roger. [[Special:Contributions/172.69.33.149|172.69.33.149]] 03:25, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
The vowelspace is depicted in two dimensions for convenience, but it has at least three dimensions. Look at the IPA vowel diagram (already added to this page). The third dimension is roundedness.&lt;br /&gt;
:Yes, of the lips; apart from the two dimensions (out: place, and up: closedeness) of the tongue. [[Special:Contributions/172.70.206.95|172.70.206.95]] 22:59, 10 August 2022 (UTC)&lt;br /&gt;
::Does roundedness also involve the tongue and cheeks to any extent? [[Special:Contributions/172.69.33.199|172.69.33.199]] 23:36, 10 August 2022 (UTC)&lt;br /&gt;
:I wonder if Randall is doing this similarly to the way physicists present space-time diagrams with only 2 dimensions of space. We can visualize 3 dimensions using projections on 2-dimensional images, but it's hard to visualize 4 dimensions. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:18, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
This linguist character has appeared 3 times now. Will there be a new character page dedicated to Gretchen or &amp;quot;The Linguist&amp;quot;? [[Special:Contributions/172.69.33.225|172.69.33.225]] 00:21, 11 August 2022 (UTC)&lt;br /&gt;
:I second this motion. I think it would make more sense to have a generic character called &amp;quot;the Linguist&amp;quot; since, as the explanation for 2381 points out, not every linguist in xkcd is necessarily Gretchen. Plus, it seems like with this comic he's varied the artistic style, with the hair looking slightly less frizzy. [[Special:Contributions/172.69.248.143|172.69.248.143]] 22:15, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Can someone please create and paste in a zalgostring for the fancy 'əG' ligature shown twice in the comic? [[Special:Contributions/172.70.211.134|172.70.211.134]] 01:10, 11 August 2022 (UTC)&lt;br /&gt;
:Is this another example of Randall trolling Explainxkcd as in [[2619: Crêpe]]? [[Special:Contributions/172.69.33.37|172.69.33.37]] 01:45, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Someone please remind me how to Zalgo a top horizontal bar over √-1. [[Special:Contributions/172.70.211.134|172.70.211.134]] 02:34, 11 August 2022 (UTC)&lt;br /&gt;
: Slow way = Windows Character Map --&amp;gt; Group by: unicode subrange... Group By: Combining Diacritical Marks. 6th character from the top left (U+0305:Overline) yields √-̅1̅.&lt;br /&gt;
:Fast way = HTML character entities, ''{character it combines with}&amp;amp;#{character number code};'' (773:Overline) yields √-&amp;amp;#773;1&amp;amp;#773;&lt;br /&gt;
:Ignore other codes as they are either non-combining or have height relative to combining character (ie Macron) -- [[Special:Contributions/172.69.70.201|172.69.70.201]] 04:35, 11 August 2022 (UTC)&lt;br /&gt;
::Are you sure? Those aren't wide enough to connect along the top for me. [[Special:Contributions/172.69.34.10|172.69.34.10]] 07:57, 11 August 2022 (UTC)&lt;br /&gt;
::[same person as previous above] looks great now, let me check innthe browser that it had issues in.... [[Special:Contributions/172.70.214.45|172.70.214.45]] 02:24, 12 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
I don’t think what Randall is trying to do is provide a “roundness” dimension, but that’s how the explanation reads to me right now (“such” a dimension, e.g.) [[User:Szeth Pancakes|Szeth Pancakes]] ([[User talk:Szeth Pancakes|talk]]) 05:13, 11 August 2022 (UTC)&lt;br /&gt;
: Agreed - rearranged it a bit to deal with the real-life dimensions first, then be more explicit that the proposal is to add to the existing dimensions in a way analogous to how imaginary numbers expand the domain of real numbers. [[Special:Contributions/172.70.91.128|172.70.91.128]] 08:19, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Being an Englishman of a certain age, I had a panic flash back to the ITA. [[User:Arachrah|Arachrah]] ([[User talk:Arachrah|talk]]) 12:55, 11 August 2022 (UTC)&lt;br /&gt;
:What was wrong with the Independant Television Authority?&lt;br /&gt;
:(Seriously, though, the Initial Teaching Alphabet was very bad... It insisted that &amp;quot;book&amp;quot; had a different vowel in it to &amp;quot;up&amp;quot;, contrary to everyone's experience, including the teacher who tried to use it. - Ironically, though, when a few years later we were in 'big school' and being taught our first French lesson we got confused by being told at the very start that the words &amp;quot;''un''&amp;quot; and &amp;quot;''une''&amp;quot; (written on the board) were the equivalent to the English word &amp;quot;uh&amp;quot; (spoken)... Uh? What's &amp;quot;uh&amp;quot;?... &amp;quot;You know, as in 'uh book', 'uh table', 'uh chair'...&amp;quot;) [[Special:Contributions/172.70.85.13|172.70.85.13]] 14:37, 11 August 2022 (UTC)&lt;br /&gt;
::I'm curious how you pronounce them if they *aren't* different vowels: is it uhp and b'uhk (^p and b^k in IPA), the Near-close near-back rounded vowel (not sure how to describe it or get the upside down omega to render, or something entirely different? [[Special:Contributions/172.70.131.126|172.70.131.126]] 21:57, 11 August 2022 (UTC)&lt;br /&gt;
:::Quite possibly, but I'm never entirely confident that I have the right impression of what a given IPA means, from my particular regional accent as a baseline. Definitely the same (excepting the phonemic ending each of &amp;quot;-uck/-upp&amp;quot; and the presence or not of another initial element).&lt;br /&gt;
:::A good comparative linguist could probably name the various zones (encompassed by various isogloss lines) where this is true. And, by actually hearing me, perhaps narrow down the one from which I actually hail, quite accurately. At least one set of my grandparents always said &amp;quot;book&amp;quot; (or &amp;quot;look&amp;quot;) more like the longer &amp;quot;ew&amp;quot; than &amp;quot;uh&amp;quot;, and they were pretty much always local to another town just 10-15 miles away from the one of my own birth/upbringing (don't remember much of the other grandparents, but they were also from a village more in the other area than my own, but making an almost equilateral triangle on the map). Traces of this kind of 'elsewhere' accent from my parents probably did make me stand out a little bit from my &amp;quot;nth generation local&amp;quot; peers. But still up≈book applies.&lt;br /&gt;
:::If I had a cat, by now it would be staring up at me, wondering why I've been saying &amp;quot;up book book up look whup uck luck suck tuck muck Krup ... (etc)&amp;quot; to myself, trying to detect any changes and all similarities. While imaging myself in various social situations that demand broader or more RPified pronunciations... ;) ((Plus trying to calculate my exact tongue-placement/etc.)) [[Special:Contributions/141.101.99.242|141.101.99.242]] 23:09, 11 August 2022 (UTC)&lt;br /&gt;
:Blast from the past! I remember ITA from when I was in elementary school on Long Island in the 60's. In my later years I frequently confused this with IPA. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:18, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Not sure what the text &amp;quot;There is one unique such function and the new mathematics is consistent.&amp;quot; - in current version, with similarly bad historic variations - is supposed to mean. The point of sqrt(-1) is that it never had a valid result on the Real number-line, and only by imagining a non-real dimension can you start to work with such a number (alone or in combination with real values) with a consistency that allows even nth-roots and exponentiation. The &amp;quot;unique (...) function&amp;quot; bit sounds strange. And note that -1 does ''not'' have a single unique root (which I can't help feeling is what is trying to be said, still)... its two roots are i and -i, for much the same reason that sqrt(1)=±1. But maybe the statement I'm wondering about is written under some branch of functional number-theory that I'm not familiar with, so could the relevent editor(s) please do it in a way that won't so confuse/trouble me or mislead others? [[Special:Contributions/172.70.91.80|172.70.91.80]] 22:03, 11 August 2022 (UTC)&lt;br /&gt;
:Done. [[Special:Contributions/172.69.34.58|172.69.34.58]] 23:09, 11 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Since when does a completely generic orthogonal projection from 2- to 3-D invoke the Gell-Mann quark model? Unicode needs a glyph to tell physicists to settle down. Removed: &amp;quot;The multi-plane scheme of the comic seems inspired by the representation of the Gell-Mann quark model used in particle physics (you can see one on page 4 of the [https://pdg.lbl.gov/2022/reviews/rpp2022-rev-quark-model.pdf Particle Data Group quark model review]).&amp;quot; [[Special:Contributions/172.70.211.88|172.70.211.88]] 02:02, 12 August 2022 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.214.45</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2657:_Complex_Vowels&amp;diff=292479</id>
		<title>2657: Complex Vowels</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2657:_Complex_Vowels&amp;diff=292479"/>
				<updated>2022-08-11T00:15:25Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.214.45: /* Explanation */ eliminate redirect&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2657&lt;br /&gt;
| date      = August 10, 2022&lt;br /&gt;
| title     = Complex Vowels&lt;br /&gt;
| image     = complex_vowels.png&lt;br /&gt;
| titletext = Pronouncing [ṡṡċċḣḣẇẇȧȧ] is easy; you just say it like the 'x' in 'fire'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a ROUNDED TONGUE. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[[File:Ipa-chart-vowels.png|thumb|200px|The IPA vowel chart]]&lt;br /&gt;
&lt;br /&gt;
In phonetics based on the {{w|International Phonetic Alphabet}} (IPA), the space of {{w|vocal tract}} articulators determining {{w|voiced phoneme}}s such as vowels (as opposed to unvoiced consonants) is represented as two-dimensional, based on the position of the tongue. The y axis represents vowel height (i.e. how close or far the tongue is from the top of the mouth) and the x axis represents frontness/backness (i.e. how close or far the tongue is from the teeth). The position of the tongue, along with the frequency of the {{w|vocal cords}} vibrating in the larynx from air being exhaled by the diaphragm, is the primary determinant of the fundamental and second {{w|formant}}s of vowel sounds. &lt;br /&gt;
&lt;br /&gt;
A third dimension of vowel sounds is the &amp;quot;roundedness&amp;quot; of the lips, and to a much lesser extent the tongue and cheeks, which is not represented on the IPA vowel chart to the right. [[Randall]] thus suggests using complex notation to indicate such a third dimension.&lt;br /&gt;
&lt;br /&gt;
In mathematics, complex numbers are numbers including both real numbers and imaginary numbers. A complex number can be expressed as &amp;quot;''a'' + ''b''i&amp;quot; where ''a'' and ''b'' are real numbers, but the latter is combined with i, the imaginary part, to convey a multiple of the square root of negative one. When expanding the one-dimensional number line with an imaginary axis, it becomes two-dimensional with any 'b' component being represented perpendicularly away from the original 'real' line. Linguists never use the complex plane to represent vowel roundedness.{{cn}} Other higher-dimensional vowel representations include {{w|diphthong}}s, which are simply two sequential vowels slurred together; diphones, which represent the last half of one phoneme followed by the first half of the next, and the {{w|vowel shift}} mappings delineating different accents and long-term evolution of voiced phone sounds.&lt;br /&gt;
&lt;br /&gt;
This comic conflates complex numbers in mathematics with &amp;quot;complex vowels&amp;quot; in linguistics. This creates a series of sounds which cannot be properly processed by the human brain, represented graphically as {{w|Zalgo text}} IPA. This is similar to the cliche of &amp;quot;black speech&amp;quot; in Lovecraftian horror, a language created by alien beings with different vocal patterns than humans. In reality, people find Zalgo text amusing, thus the humor of the comic, but not particularly insanity-inducing or even more than mildly confusing.&lt;br /&gt;
&lt;br /&gt;
In linguistics ə is the {{w|schwa}} symbol, referred to in the title text, the most common vowel sound in English polysyllabic words (the a in comma or the second e in letter). The schwa symbol looks like a reversed e symbol (the base of natural logarithms). Production of the schwa sound takes place with the tongue, jaw, and lips all in a relaxed, central position.&lt;br /&gt;
&lt;br /&gt;
The linguist in the comic appears to be {{w|Gretchen McCulloch}}, as previously depicted in [[2421: Tower of Babel]] and [[2381: The True Name of the Bear]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A diagram shows the extrusion of the trapezoidal IPA vowel chart upwards into three dimensions. A point near the center is labeled with an equation that shows &amp;quot;ə + 1/2 * sqrt(-1)&amp;quot; as being equivalent to a made-up symbol that looks like two schwas mirroring each other with other markings above and below.]&lt;br /&gt;
&lt;br /&gt;
:[Below the diagram, a character with shoulder-length dark wavy hair pronounces the new vowel in a speech bubble with unstable lines surrounding it. Two bystanders to her right are bent over slightly, clutching their heads in apparent anguish.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Linguistics tip: Extend the IPA vowel plane along the imaginary axis to produce ''complex vowels'', cursed sounds which the human mind cannot comprehend.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Tips]]&lt;br /&gt;
[[Category:Language]]&lt;/div&gt;</summary>
		<author><name>172.70.214.45</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2657:_Complex_Vowels&amp;diff=292478</id>
		<title>2657: Complex Vowels</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2657:_Complex_Vowels&amp;diff=292478"/>
				<updated>2022-08-11T00:12:54Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.214.45: /* Explanation */ other higher dimensionalities&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2657&lt;br /&gt;
| date      = August 10, 2022&lt;br /&gt;
| title     = Complex Vowels&lt;br /&gt;
| image     = complex_vowels.png&lt;br /&gt;
| titletext = Pronouncing [ṡṡċċḣḣẇẇȧȧ] is easy; you just say it like the 'x' in 'fire'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a ROUNDED TONGUE. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
[[File:Ipa-chart-vowels.png|thumb|200px|The IPA vowel chart]]&lt;br /&gt;
&lt;br /&gt;
In phonetics based on the {{w|International Phonetic Alphabet}} (IPA), the space of {{w|vocal tract}} articulators determining {{w|voiced phoneme}}s such as vowels (as opposed to unvoiced consonants) is represented as two-dimensional, based on the position of the tongue. The y axis represents vowel height (i.e. how close or far the tongue is from the top of the mouth) and the x axis represents frontness/backness (i.e. how close or far the tongue is from the teeth). The position of the tongue, along with the frequency of the {{w|vocal folds}} vibrating in the larynx from air being exhaled by the diaphragm, is the primary determinant of the fundamental and second {{w|formant}}s of vowel sounds. &lt;br /&gt;
&lt;br /&gt;
A third dimension of vowel sounds is the &amp;quot;roundedness&amp;quot; of the lips, and to a much lesser extent the tongue and cheeks, which is not represented on the IPA vowel chart to the right. [[Randall]] thus suggests using complex notation to indicate such a third dimension.&lt;br /&gt;
&lt;br /&gt;
In mathematics, complex numbers are numbers including both real numbers and imaginary numbers. A complex number can be expressed as &amp;quot;''a'' + ''b''i&amp;quot; where ''a'' and ''b'' are real numbers, but the latter is combined with i, the imaginary part, to convey a multiple of the square root of negative one. When expanding the one-dimensional number line with an imaginary axis, it becomes two-dimensional with any 'b' component being represented perpendicularly away from the original 'real' line. Linguists never use the complex plane to represent vowel roundedness.{{cn}} Other higher-dimensional vowel representations include {{w|diphthong}}s, which are simply two sequential vowels slurred together; diphones, which represent the last half of one phoneme followed by the first half of the next, and the {{w|vowel shift}} mappings delineating different accents and long-term evolution of voiced phone sounds.&lt;br /&gt;
&lt;br /&gt;
This comic conflates complex numbers in mathematics with &amp;quot;complex vowels&amp;quot; in linguistics. This creates a series of sounds which cannot be properly processed by the human brain, represented graphically as {{w|Zalgo text}} IPA. This is similar to the cliche of &amp;quot;black speech&amp;quot; in Lovecraftian horror, a language created by alien beings with different vocal patterns than humans. In reality, people find Zalgo text amusing, thus the humor of the comic, but not particularly insanity-inducing or even more than mildly confusing.&lt;br /&gt;
&lt;br /&gt;
In linguistics ə is the {{w|schwa}} symbol, referred to in the title text, the most common vowel sound in English polysyllabic words (the a in comma or the second e in letter). The schwa symbol looks like a reversed e symbol (the base of natural logarithms). Production of the schwa sound takes place with the tongue, jaw, and lips all in a relaxed, central position.&lt;br /&gt;
&lt;br /&gt;
The linguist in the comic appears to be {{w|Gretchen McCulloch}}, as previously depicted in [[2421: Tower of Babel]] and [[2381: The True Name of the Bear]].&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[A diagram shows the extrusion of the trapezoidal IPA vowel chart upwards into three dimensions. A point near the center is labeled with an equation that shows &amp;quot;ə + 1/2 * sqrt(-1)&amp;quot; as being equivalent to a made-up symbol that looks like two schwas mirroring each other with other markings above and below.]&lt;br /&gt;
&lt;br /&gt;
:[Below the diagram, a character with shoulder-length dark wavy hair pronounces the new vowel in a speech bubble with unstable lines surrounding it. Two bystanders to her right are bent over slightly, clutching their heads in apparent anguish.]&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:Linguistics tip: Extend the IPA vowel plane along the imaginary axis to produce ''complex vowels'', cursed sounds which the human mind cannot comprehend.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Tips]]&lt;br /&gt;
[[Category:Language]]&lt;/div&gt;</summary>
		<author><name>172.70.214.45</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2654:_Chemtrails&amp;diff=292135</id>
		<title>2654: Chemtrails</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2654:_Chemtrails&amp;diff=292135"/>
				<updated>2022-08-06T14:19:42Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.214.45: /* Explanation */ also paragraph&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2654&lt;br /&gt;
| date      = August 3, 2022&lt;br /&gt;
| title     = Chemtrails&lt;br /&gt;
| image     = chemtrails.png&lt;br /&gt;
| titletext = Ants have reverse chemtrails--regular citizens spraying chemicals everywhere they go to control the government.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by an INKJET PRINTER FILLED WITH PERFUME. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{w|Entomologist}}s study insects. {{w|Ant}}s are insects that leave chemical trails to and from food sources or other events. These chemical trails can guide other ants in the colony, for instance, to return to food.  Biologists call such signaling chemicals {{w|pheromones}}.  This comic uses the word chemtrail as a shortening of chemical trail. [[Cueball]] is intentionally conflating ant chemical trails with {{w|chemtrails}}, the subject of a fallacious conspiracy theory that the government controls the population by spraying toxic or mind-/body-transformative chemicals from high altitude aircraft. &lt;br /&gt;
&lt;br /&gt;
That myth may be partly based on the practice of {{w|cloud seeding}}, which uses chemical flares containing silver nitrate to attempt to increase precipitation,[https://www.vox.com/videos/23290459/cloud-seeding-manmade-rain-future-perfect] on studies of chemical mind control among ants,[https://www.sciencedirect.com/science/article/abs/pii/S0022191016301640] or on the effects of the common parasite ''{{w|toxoplasma gondii}}'' on cats' prey. Despite [[1677: Contrails|occasional conflation]], chemtrails are distinct from &amp;quot;contrails,&amp;quot; short for &amp;quot;condensation trails,&amp;quot; which are cloud-like lines in the sky created by airplane engines. Such linear cloud formations only sometimes arise from temperature and pressure disturbances of the passing engines, rather than any deliberate release, but are highly visible in the right conditions under flightpaths, and may have the appearance of &amp;quot;spraying&amp;quot; action. {{w|Nucleation#Examples of the nucleation of fluids (gases and liquids)|Vapor nucleation}} is central to both cloud seeding and contrails. People sometimes attempt chemical manipulation of unwitting people in small areas (such as scent based marketing, or wearing scented products).[https://www.businessnewsdaily.com/3469-smells-shoppers-spend-more.html]  There is very little evidence that sophisticated mind control posited by chemtrail conspiracists is possible, even after extensive research.[https://www.google.com/books/edition/Poisoner_in_Chief/U6iDDwAAQBAJ]&lt;br /&gt;
&lt;br /&gt;
[[Ponytail]] is an entomologist, studying chemically mediated cooperative ant navigation. [[Cueball]] knows she will be annoyed when he tells her, &amp;quot;So, I hear you're really into chemtrails?&amp;quot; Indeed, he gets the reaction he hoped for when she objects strongly and rejects this with a loud, &amp;quot;'''No!!'''&amp;quot; The choice of terminology is often a sore spot for those who study a particular field in depth, for example entomological discussions of &amp;quot;slave-making&amp;quot; in socially parasitic species.[https://evolve.community.uaf.edu/2015/04/23/emantcipation-when-captured-ants-rise-against-their-captors/] [[Randall]] writes in the caption that such misuse is how to annoy people like Ponytail.&lt;br /&gt;
&lt;br /&gt;
The title text humorously contrasts individual ants instinctively deciding how the whole colony behaves by using chemicals to indicate routes to food or dangers to motivate the colony to react to their individual experiences, with the human fear of loss of personal independence by being regulated by otherwise disconnected ruling elites, as depicted in the ant/technology interaction speculative fiction-themed [https://www.youtube.com/watch?v=fISvc-yUU1A &amp;quot;Infrared&amp;quot;] music video by the alt-rock band ''Placebo''.&lt;br /&gt;
&lt;br /&gt;
Ants are a recurring theme, as are those who study them. See for instance [[638: The Search]] which specifically deals with ant's pheromone trails or [[1610: Fire Ants]]. Chemtrails were also the subject of [[966: Jet Fuel]], [[1677: Contrails]], and were mentioned in [[1803: Location Reviews]]. This comic has a similar format to [[2036: Edgelord]]: a simple one-panel interaction consisting of a (likely deliberate) misuse of a term in regards to a professional's work, followed immediately by the professional's upset outburst, and Randall's caption spelling out &amp;quot;How to annoy&amp;quot; the professional. Both seem related to Randall's [[:Category:My Hobby|hobbies]], as he seems to think a lot about how to annoy specific groups of people (perhaps in an attempt to minimize annoyances?).&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
&lt;br /&gt;
:[Cueball stands talking to Ponytail, who has her arms raised and has small lines above her head to indicate annoyance.]&lt;br /&gt;
:Cueball: So, I hear you're really into chemtrails?&lt;br /&gt;
:Ponytail: '''''No!!'''''&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:How to annoy entomologists who study ant navigation&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
*Whether ant gland secretion signalling is {{w|Turing completeness|Turing-equivalent}} is explored in Douglas Hofstadter's ''{{w|Gödel, Escher, Bach|Gödel, Escher, Bach: an Eternal Golden Braid}}''.&lt;br /&gt;
*Ponytail may conceivably be a professional entomologist who once worked with an editor who inserted the word &amp;quot;chemtrails&amp;quot; in one of her [https://link.springer.com/article/10.1007/s00359-019-01363-z comparative physiology] or [https://link.springer.com/article/10.1007/s10071-020-01354-7 ''Animal Cognition''] drafts competing before a peer review panel with papers by [https://bio.kuleuven.be/ento/pdfs/billen_procnev_2006_signal_variety.pdf Johan Bilen] of the Leuven University Zoological Institute and Harvard's [https://www.hup.harvard.edu/catalog.php?isbn=9780674045880 Rüdiger Wehner].&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:Chemistry]]&lt;br /&gt;
[[Category:Biology]]&lt;br /&gt;
[[Category:Puns]]&lt;br /&gt;
[[Category:Conspiracy theory]]&lt;/div&gt;</summary>
		<author><name>172.70.214.45</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2654:_Chemtrails&amp;diff=292134</id>
		<title>2654: Chemtrails</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2654:_Chemtrails&amp;diff=292134"/>
				<updated>2022-08-06T14:18:47Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.214.45: /* Explanation */ paragraph&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2654&lt;br /&gt;
| date      = August 3, 2022&lt;br /&gt;
| title     = Chemtrails&lt;br /&gt;
| image     = chemtrails.png&lt;br /&gt;
| titletext = Ants have reverse chemtrails--regular citizens spraying chemicals everywhere they go to control the government.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by an INKJET PRINTER FILLED WITH PERFUME. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{w|Entomologist}}s study insects. {{w|Ant}}s are insects that leave chemical trails to and from food sources or other events. These chemical trails can guide other ants in the colony, for instance, to return to food.  Biologists call such signaling chemicals {{w|pheromones}}.  This comic uses chemtrail as a shortening of chemical trail.&lt;br /&gt;
&lt;br /&gt;
[[Cueball]] is intentionally conflating ant chemical trails with {{w|chemtrails}}, the subject of a fallacious conspiracy theory that the government controls the population by spraying toxic or mind-/body-transformative chemicals from high altitude aircraft. &lt;br /&gt;
&lt;br /&gt;
That myth may be partly based on the practice of {{w|cloud seeding}}, which uses chemical flares containing silver nitrate to attempt to increase precipitation,[https://www.vox.com/videos/23290459/cloud-seeding-manmade-rain-future-perfect] on studies of chemical mind control among ants,[https://www.sciencedirect.com/science/article/abs/pii/S0022191016301640] or on the effects of the common parasite ''{{w|toxoplasma gondii}}'' on cats' prey. Despite [[1677: Contrails|occasional conflation]], chemtrails are distinct from &amp;quot;contrails,&amp;quot; short for &amp;quot;condensation trails,&amp;quot; which are cloud-like lines in the sky created by airplane engines. Such linear cloud formations only sometimes arise from temperature and pressure disturbances of the passing engines, rather than any deliberate release, but are highly visible in the right conditions under flightpaths, and may have the appearance of &amp;quot;spraying&amp;quot; action. {{w|Nucleation#Examples of the nucleation of fluids (gases and liquids)|Vapor nucleation}} is central to both cloud seeding and contrails. People sometimes attempt chemical manipulation of unwitting people in small areas (such as scent based marketing, or wearing scented products).[https://www.businessnewsdaily.com/3469-smells-shoppers-spend-more.html]  There is very little evidence that sophisticated mind control posited by chemtrail conspiracists is possible, even after extensive research.[https://www.google.com/books/edition/Poisoner_in_Chief/U6iDDwAAQBAJ]&lt;br /&gt;
&lt;br /&gt;
[[Ponytail]] is an entomologist, studying chemically mediated cooperative ant navigation. [[Cueball]] knows she will be annoyed when he tells her, &amp;quot;So, I hear you're really into chemtrails?&amp;quot; Indeed, he gets the reaction he hoped for when she objects strongly and rejects this with a loud, &amp;quot;'''No!!'''&amp;quot; The choice of terminology is often a sore spot for those who study a particular field in depth, for example entomological discussions of &amp;quot;slave-making&amp;quot; in socially parasitic species.[https://evolve.community.uaf.edu/2015/04/23/emantcipation-when-captured-ants-rise-against-their-captors/] [[Randall]] writes in the caption that such misuse is how to annoy people like Ponytail.&lt;br /&gt;
&lt;br /&gt;
The title text humorously contrasts individual ants instinctively deciding how the whole colony behaves by using chemicals to indicate routes to food or dangers to motivate the colony to react to their individual experiences, with the human fear of loss of personal independence by being regulated by otherwise disconnected ruling elites, as depicted in the ant/technology interaction speculative fiction-themed [https://www.youtube.com/watch?v=fISvc-yUU1A &amp;quot;Infrared&amp;quot;] music video by the alt-rock band ''Placebo''.&lt;br /&gt;
&lt;br /&gt;
Ants are a recurring theme, as are those who study them. See for instance [[638: The Search]] which specifically deals with ant's pheromone trails or [[1610: Fire Ants]]. Chemtrails were also the subject of [[966: Jet Fuel]], [[1677: Contrails]], and were mentioned in [[1803: Location Reviews]]. This comic has a similar format to [[2036: Edgelord]]: a simple one-panel interaction consisting of a (likely deliberate) misuse of a term in regards to a professional's work, followed immediately by the professional's upset outburst, and Randall's caption spelling out &amp;quot;How to annoy&amp;quot; the professional. Both seem related to Randall's [[:Category:My Hobby|hobbies]], as he seems to think a lot about how to annoy specific groups of people (perhaps in an attempt to minimize annoyances?).&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
&lt;br /&gt;
:[Cueball stands talking to Ponytail, who has her arms raised and has small lines above her head to indicate annoyance.]&lt;br /&gt;
:Cueball: So, I hear you're really into chemtrails?&lt;br /&gt;
:Ponytail: '''''No!!'''''&lt;br /&gt;
&lt;br /&gt;
:[Caption below the panel:]&lt;br /&gt;
:How to annoy entomologists who study ant navigation&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
*Whether ant gland secretion signalling is {{w|Turing completeness|Turing-equivalent}} is explored in Douglas Hofstadter's ''{{w|Gödel, Escher, Bach|Gödel, Escher, Bach: an Eternal Golden Braid}}''.&lt;br /&gt;
*Ponytail may conceivably be a professional entomologist who once worked with an editor who inserted the word &amp;quot;chemtrails&amp;quot; in one of her [https://link.springer.com/article/10.1007/s00359-019-01363-z comparative physiology] or [https://link.springer.com/article/10.1007/s10071-020-01354-7 ''Animal Cognition''] drafts competing before a peer review panel with papers by [https://bio.kuleuven.be/ento/pdfs/billen_procnev_2006_signal_variety.pdf Johan Bilen] of the Leuven University Zoological Institute and Harvard's [https://www.hup.harvard.edu/catalog.php?isbn=9780674045880 Rüdiger Wehner].&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Comics featuring Cueball]]&lt;br /&gt;
[[Category:Comics featuring Ponytail]]&lt;br /&gt;
[[Category:Animals]]&lt;br /&gt;
[[Category:Chemistry]]&lt;br /&gt;
[[Category:Biology]]&lt;br /&gt;
[[Category:Puns]]&lt;br /&gt;
[[Category:Conspiracy theory]]&lt;/div&gt;</summary>
		<author><name>172.70.214.45</name></author>	</entry>

	</feed>