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		<id>https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=3134%3A_Wavefunction_Collapse</id>
		<title>3134: Wavefunction Collapse - Revision history</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=3134%3A_Wavefunction_Collapse"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;action=history"/>
		<updated>2026-04-21T13:01:07Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=403174&amp;oldid=prev</id>
		<title>Maxcodes: Do not believe the &quot;incomplete&quot; applies anymore.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=403174&amp;oldid=prev"/>
				<updated>2026-01-08T20:25:17Z</updated>
		
		<summary type="html">&lt;p&gt;Do not believe the &amp;quot;incomplete&amp;quot; applies anymore.&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:25, 8 January 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{incomplete|This page was created BY&amp;#160; A SOULFUL PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same as wrong or chaotic!}}&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Maxcodes</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=390657&amp;oldid=prev</id>
		<title>Duralumin-here: /* Transcript */  Grammar and phrasing; the panels with Cueball alone aren't Panels 1-3, so I removed the potentially confusing phrasing</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=390657&amp;oldid=prev"/>
				<updated>2025-11-12T17:35:21Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Transcript: &lt;/span&gt;  Grammar and phrasing; the panels with Cueball alone aren&amp;#039;t Panels 1-3, so I removed the potentially confusing phrasing&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 17:35, 12 November 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l26&quot; &gt;Line 26:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 26:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Hairy: If the wavefunction only collapses when I observe it, does that mean my consciousness affects the universe?&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Hairy: If the wavefunction only collapses when I observe it, does that mean my consciousness affects the universe?&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:[Three panels &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;follows &lt;/del&gt;showing three possible responses from Cueball. Each panel has a label above, written inside a small rectangle that is overlaid on the top left of each panel. Each panel shows the same zoom in on the top half of Cueball.&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;]&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:[Three panels &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;follow &lt;/ins&gt;showing three possible responses from Cueball. Each panel has a label above, written inside a small rectangle that is overlaid on the top left of each panel. Each panel shows the same zoom in on the top half of Cueball.]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;:[Panel 1&lt;/del&gt;]&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Bad:&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Bad:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: Yes. Quantum entanglement proves that we all have souls.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: Yes. Quantum entanglement proves that we all have souls.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;:[Panel 2]&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Good:&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Good:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: No. Consciousness plays no role here. Its just physical measurement.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: No. Consciousness plays no role here. Its just physical measurement.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;:[Panel 3]&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Chaotic:&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Chaotic:&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: No. The wave function collapses when '''''I''''' look at it because I'm a full professor.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;:Cueball: No. The wave function collapses when '''''I''''' look at it because I'm a full professor.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Duralumin-here</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=390018&amp;oldid=prev</id>
		<title>73.190.108.81 at 18:45, 2 November 2025</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=390018&amp;oldid=prev"/>
				<updated>2025-11-02T18:45:33Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 18:45, 2 November 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l14&quot; &gt;Line 14:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 14:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The '&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Bad&lt;/del&gt;' option shows Cueball telling his student that everybody has a soul, and their individual consciousness affects reality in some way. The 'good' option shows Cueball telling his student that consciousness doesn't play a role at all, and that it is 'just a physical measurement'. The 'chaotic' option shows Cueball apparently observing that the wave function collapses only when ''he'' looks at it, because he is special in some way (in this case, Cueball is a professor while Hairy is the undergraduate student).&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The '&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;bad&lt;/ins&gt;' option shows Cueball telling his student that everybody has a soul, and their individual consciousness affects reality in some way. The 'good' option shows Cueball telling his student that consciousness doesn't play a role at all, and that it is 'just a physical measurement'. The 'chaotic' option shows Cueball apparently observing that the wave function collapses only when ''he'' looks at it, because he is special in some way (in this case, Cueball is a professor while Hairy is the undergraduate student).&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous thought experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous thought experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>73.190.108.81</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=389942&amp;oldid=prev</id>
		<title>Odd Octopus at 20:30, 31 October 2025</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=389942&amp;oldid=prev"/>
				<updated>2025-10-31T20:30:11Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:30, 31 October 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l16&quot; &gt;Line 16:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The 'Bad' option shows Cueball telling his student that everybody has a soul, and their individual consciousness affects reality in some way. The 'good' option shows Cueball telling his student that consciousness doesn't play a role at all, and that it is 'just a physical measurement'. The 'chaotic' option shows Cueball apparently observing that the wave function collapses only when ''he'' looks at it, because he is special in some way (in this case, Cueball is a professor while Hairy is the undergraduate student).&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The 'Bad' option shows Cueball telling his student that everybody has a soul, and their individual consciousness affects reality in some way. The 'good' option shows Cueball telling his student that consciousness doesn't play a role at all, and that it is 'just a physical measurement'. The 'chaotic' option shows Cueball apparently observing that the wave function collapses only when ''he'' looks at it, because he is special in some way (in this case, Cueball is a professor while Hairy is the undergraduate student).&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;though &lt;/del&gt;experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;thought &lt;/ins&gt;experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{tvtropes|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{tvtropes|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Odd Octopus</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=389630&amp;oldid=prev</id>
		<title>115.186.231.53: Added to the explanation for the title text</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=389630&amp;oldid=prev"/>
				<updated>2025-10-27T05:28:56Z</updated>
		
		<summary type="html">&lt;p&gt;Added to the explanation for the title text&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 05:28, 27 October 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l20&quot; &gt;Line 20:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 20:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{tvtropes|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{tvtropes|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;have souls. This implies that there is a chance graduate students (and, by extension, undergraduate students) do not &lt;/ins&gt;have souls.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>115.186.231.53</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=388617&amp;oldid=prev</id>
		<title>Nitpicking: /* Explanation */ I hope the lower-case letters weren't a joke I'm too dense to see</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=388617&amp;oldid=prev"/>
				<updated>2025-10-11T03:03:10Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; I hope the lower-case letters weren&amp;#039;t a joke I&amp;#039;m too dense to see&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 03:03, 11 October 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|This page was created BY&amp;#160; A &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;SOUlFUl &lt;/del&gt;PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same as wrong or chaotic!}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|This page was created BY&amp;#160; A &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;SOULFUL &lt;/ins&gt;PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same as wrong or chaotic!}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Nitpicking</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387606&amp;oldid=prev</id>
		<title>Chronotix at 13:27, 27 September 2025</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387606&amp;oldid=prev"/>
				<updated>2025-09-27T13:27:10Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 13:27, 27 September 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|This page was created BY&amp;#160; A SOUlFUl PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;a &lt;/del&gt;wrong or chaotic!}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|This page was created BY&amp;#160; A SOUlFUl PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;as &lt;/ins&gt;wrong or chaotic!}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Chronotix</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387245&amp;oldid=prev</id>
		<title>92.17.62.87: /* Explanation */ ...tyop.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387245&amp;oldid=prev"/>
				<updated>2025-09-19T23:39:05Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; ...tyop.&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 23:39, 19 September 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l18&quot; &gt;Line 18:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;tvtrope&lt;/del&gt;|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic may be taken as references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic). However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;tvtropes&lt;/ins&gt;|RuleOfThree|common variety}} of joke format.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>92.17.62.87</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387244&amp;oldid=prev</id>
		<title>92.17.62.87: /* Explanation */ It really does not match D&amp;D alignment-succession. But it does match the rule-of-three joke format ending with an unexpectedly divergent punchline.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387244&amp;oldid=prev"/>
				<updated>2025-09-19T23:38:07Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; It really does not match D&amp;amp;D alignment-succession. But it does match the rule-of-three joke format ending with an unexpectedly divergent punchline.&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 23:38, 19 September 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l18&quot; &gt;Line 18:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;are likely &lt;/del&gt;references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic).&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Good, bad, and chaotic &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;may be taken as &lt;/ins&gt;references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic)&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;. However, this allows a single alignment to be both chaotic ''and'' either good or 'bad'/evil, so is perhaps just more a matter of two extremes followed up by {{tvtropes|TakeAThirdOption|something completely different}}, to set up a {{tvtrope|RuleOfThree|common variety}} of joke format&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>92.17.62.87</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387236&amp;oldid=prev</id>
		<title>Mathmaster: Undo revision 387235 by Mathmaster (talk)</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=3134:_Wavefunction_Collapse&amp;diff=387236&amp;oldid=prev"/>
				<updated>2025-09-19T22:11:45Z</updated>
		
		<summary type="html">&lt;p&gt;Undo revision 387235 by &lt;a href=&quot;/wiki/index.php/Special:Contributions/Mathmaster&quot; title=&quot;Special:Contributions/Mathmaster&quot;&gt;Mathmaster&lt;/a&gt; (&lt;a href=&quot;/wiki/index.php/User_talk:Mathmaster&quot; title=&quot;User talk:Mathmaster&quot;&gt;talk&lt;/a&gt;)&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 22:11, 19 September 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{incomplete|This page was created BY&amp;#160; A SOUlFUl PARTICLE DETECTOR. Should the reference to unsolved problem be removed? Those comics are very different to this and the other two mentioned as it is three different things not three replies to one question. And cursed is not the same a wrong or chaotic!}}&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This comic presents three possible responses to a common question posed by undergraduates upon confronting the {{w|Measurement problem|problem of measurement}} in quantum mechanics - does the apparently privileged role of subjective or conscious {{w|Observer (quantum physics)|observers}} in wavefunction collapse imply that human consciousness itself impacts physics? This question is sometimes phrased as: does the observation effect or quantum collapse prove humans have souls? These questions stem from a misunderstanding of what an &amp;quot;observer&amp;quot; in physics really is, a misunderstanding the comic depicts with a college student asking his professor about human consciousness.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l17&quot; &gt;Line 17:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;That quantum states exist as probability density distributions, but are only ever observed in definite states, raises the question of how the quantum world transitions into the classical world. The (historically) most popular {{w|Copenhagen interpretation|interpretation}} posits that {{w|wave function collapse}} occurs upon the measurement of a quantum state, in which the multiple mathematically possible states resolve into a definite state, without explicitly defining precisely when this &amp;quot;collapse&amp;quot; occurs, or what defines &amp;quot;measurement;&amp;quot; in fact, when measuring, say, an electron in a superposition of two states, wavefunction collapse could occur at any stage from the electron interacting with the detector, to the detector recording the measurement, to the scientist observing the recording. A famous though experiment, {{w|Schrödinger's cat}}, takes this to the extreme: if a cat is placed a box with a decaying radioisotope that upon decay triggers a gas bomb that kills the cat, shouldn't this place the cat-bomb-isotope-box system into a mixed state that only undergoes wavefunction collapse upon opening and observing whether the cat is alive or dead? The Copenhagen interpretation is agnostic to this question, only confirming that the cat will have resolved into its alive or dead state at or before observation. The {{w|Consciousness causes collapse}} postulate endorsed by the &amp;quot;bad&amp;quot; panel -- unfashionable now, but taken seriously historically -- posits that the conscious observation is indeed what triggers wave-function collapse. The 'good' panel, rather flippantly, seems to endorse a more modern {{w|Quantum decoherence|decoherence}}-based interpretation - that every interaction inside the cat-box system is a &amp;quot;measurement&amp;quot; that destroys the superposition well before the human observer enters the picture. Finally, the `chaotic` option is far more radical and sollipsistic than the `bad` - it's not merely conscious observation that causes collapse, but PhD-holding and tenured consciousness. &amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Good, bad, and chaotic are likely references to the {{w|Alignment (Dungeons &amp;amp; Dragons)|alignment system}} in the role-playing game {{w|Dungeons &amp;amp; Dragons}}. In D&amp;amp;D, roles are characterized by their morality (good/neutral/evil) and their views about order (lawful/neutral/chaotic).&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text continues the chaotic option.&amp;#160; Graduate students are intermediate between undergraduate and professors.&amp;#160; It is unclear whether graduate students can cause waveform collapse, and therefore have souls.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Mathmaster</name></author>	</entry>

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