<!DOCTYPE html><HTML lang="en"> <head><meta charset="utf-8"> <title>Barnette (R.L.) - Does Quantum Mechanics Disprove the Principle of the Identity of Indiscernibles? (Theo Todman's Book Collection - Paper Abstracts) </title> <link href="../../TheosStyle.css" rel="stylesheet" type="text/css"><link rel="shortcut icon" href="../../TT_ICO.png" /></head> <BODY> <CENTER> <div id="header"><HR><h1>Theo Todman's Web Page - Paper Abstracts</h1><HR></div><A name="Top"></A> <TABLE class = "Bridge" WIDTH=950> <tr><th><A HREF = "../../PaperSummaries/PaperSummary_06/PaperSummary_6455.htm">Does Quantum Mechanics Disprove the Principle of the Identity of Indiscernibles?</A></th></tr> <tr><th><A HREF = "../../Authors/B/Author_Barnette (R.L.).htm">Barnette (R.L.)</a></th></tr> <tr><th>Source: Philosophy of Science 45.3 (Sept. 1978), pp. 466-470</th></tr> <tr><th>Paper - Abstract</th></tr> </TABLE> </CENTER> <P><CENTER><TABLE class = "Bridge" WIDTH=200><tr><td><A HREF = "../../PaperSummaries/PaperSummary_06/PaperSummary_6455.htm">Paper Summary</A></td></tr></TABLE></CENTER></P> <hr><P><FONT COLOR = "0000FF"><FONT COLOR = "800080"><ol type="1">It has been argued by A Cortes that, according to the Copenhagen interpretation of quantum mechanics, one can construe certain experimental results as showing that photons (light quanta) violate Leibniz's principle of the <a name="1"></a><A HREF="../../Notes/Notes_0/Notes_81.htm">identity of indiscernibles</A><SUP>1</SUP> (l), and that such entities should be considered as belonging to a class of entities he calls "non-individuals". I argue that this position is unsupported by the case Cortes gives, and that we should avoid countenancing such a class of entities and the awkward semantics that would result from such talk. Moreover, I maintain that microentities can be construed as satisfying (l) by arguing that, although spatial/temporal properties might fail to differentiate two or more photons, other properties -- I call them 'historical' -- are in fact not shared by each.</ol></FONT><FONT COLOR = "0000FF"><HR></P><a name="ColourConventions"></a><p><b>Text Colour Conventions (see <A HREF="../../Notes/Notes_10/Notes_1025.htm">disclaimer</a>)</b></p><OL TYPE="1"><LI><FONT COLOR = "0000FF">Blue</FONT>: Text by me; &copy; Theo Todman, 2018</li><LI><FONT COLOR = "800080">Mauve</FONT>: Text by correspondent(s) or other author(s); &copy; the author(s)</li></OL> <BR><HR><BR><CENTER> <TABLE class = "Bridge" WIDTH=950> <TR><TD WIDTH="30%">&copy; Theo Todman, June 2007 - August 2018.</TD> <TD WIDTH="40%">Please address any comments on this page to <A HREF="mailto:theo@theotodman.com">theo@theotodman.com</A>.</TD> <TD WIDTH="30%">File output: <time datetime="2018-08-02T06:46" pubdate>02/08/2018 06:46:36</time> <br><A HREF="../../Notes/Notes_10/Notes_1010.htm">Website Maintenance Dashboard</A></TD></TR> <TD WIDTH="30%"><A HREF="#Top">Return to Top of this Page</A></TD> <TD WIDTH="40%"><A HREF="../../Notes/Notes_11/Notes_1140.htm">Return to Theo Todman's Philosophy Page</A></TD> <TD WIDTH="30%"><A HREF="../../index.htm">Return to Theo Todman's Home Page</A></TD> </TR></TABLE></CENTER><HR> </BODY> </HTML>