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		<updated>2026-04-15T08:15:51Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:205:_Candy_Button_Paper&amp;diff=43059</id>
		<title>Talk:205: Candy Button Paper</title>
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				<updated>2013-07-06T16:03:21Z</updated>
		
		<summary type="html">&lt;p&gt;69.163.36.90: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;It is possible to run a Turing machine on a candy belt:&lt;br /&gt;
&lt;br /&gt;
Marvin Minsky (1967), Computation: Finite and Infinite Machines, Prentice-Hall, Inc. Englewood Cliffs, N.J. In particular see p. 262ff (italics in original):&lt;br /&gt;
&amp;quot;We can now demonstrate the remarkable fact, first shown by Wang [1957], that for any Turing machine T there is an equivalent Turing machine TN that ''never changes a once-written symbol''! In fact, we will construct a two-symbol machine TN that can only change blank squares on its tape to 1's but can not change a 1 back to a blank.&amp;quot; Minsky then offers a proof of this. [[Special:Contributions/69.163.36.90|69.163.36.90]] 16:01, 6 July 2013 (UTC)&lt;/div&gt;</summary>
		<author><name>69.163.36.90</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:205:_Candy_Button_Paper&amp;diff=43058</id>
		<title>Talk:205: Candy Button Paper</title>
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				<updated>2013-07-06T16:01:06Z</updated>
		
		<summary type="html">&lt;p&gt;69.163.36.90: Created page with &amp;quot;It is possible to run a Turing machine on a candy belt:  Marvin Minsky (1967), Computation: Finite and Infinite Machines, Prentice-Hall, Inc. Englewood Cliffs, N.J. In particu...&amp;quot;&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;It is possible to run a Turing machine on a candy belt:&lt;br /&gt;
&lt;br /&gt;
Marvin Minsky (1967), Computation: Finite and Infinite Machines, Prentice-Hall, Inc. Englewood Cliffs, N.J. In particular see p. 262ff (italics in original):&lt;br /&gt;
&amp;quot;We can now demonstrate the remarkable fact, first shown by Wang [1957], that for any Turing machine T there is an equivalent Turing machine TN that never changes a once-written symbol! In fact, we will construct a two-symbol machine TN that can only change blank squares on its tape to 1's but can not change a 1 back to a blank.&amp;quot; Minsky then offers a proof of this. [[Special:Contributions/69.163.36.90|69.163.36.90]] 16:01, 6 July 2013 (UTC)&lt;/div&gt;</summary>
		<author><name>69.163.36.90</name></author>	</entry>

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