<!DOCTYPE html><HTML lang="en"> <head><meta charset="utf-8"> <title>Forrest (Peter) - 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_00/PaperSummary_438.htm">The Identity of Indiscernibles</A></th></tr> <tr><th><A HREF = "../../Authors/F/Author_Forrest (Peter).htm">Forrest (Peter)</a></th></tr> <tr><th>Source: Stanford Encyclopaedia of Philosophy, 1996-2010</th></tr> <tr><th>Paper - Abstract</th></tr> </TABLE> </CENTER> <P><CENTER><TABLE class = "Bridge" WIDTH=400><tr><td><A HREF = "../../PaperSummaries/PaperSummary_00/PaperSummary_438.htm">Paper Summary</A></td><td><A HREF = "../../PaperSummaries/PaperSummary_00/PapersToNotes_438.htm">Notes Citing this Paper</A></td></tr></TABLE></CENTER></P> <hr><P><FONT COLOR = "0000FF"><U>Author s Abstract</U><FONT COLOR = "800080"><BR><BR>The <a name="1"></a><A HREF="../../Notes/Notes_0/Notes_81.htm">Identity of Indiscernibles</A><SUP>1</SUP> is a principle of analytic ontology first explicitly formulated by Wilhelm Gottfried Leibniz in his <I>Discourse on Metaphysics</I>, Section 9 (Loemker 1969: 308). It states that no two distinct things exactly resemble each other. This is often referred to as <a name="2"></a><A HREF="../../Notes/Notes_0/Notes_81.htm"> Leibniz's Law </A><SUP>2</SUP> and is typically understood to mean that no two objects have exactly the same properties. The <a name="3"></a><A HREF="../../Notes/Notes_0/Notes_81.htm">Identity of Indiscernibles</A><SUP>3</SUP> is of interest because it raises questions about the factors which individuate qualitatively identical objects. Recent work on the interpretation of quantum mechanics suggests that the principle fails in the quantum domain (see French 2006).<BR><ol type="1"><li>Formulating the Principle</li><li>Ontological Implications</li><li>Arguments for and against the Principle</li><li>The History of the Principle<BR>Bibliography<BR>Other Internet Resources<BR>Related Entries</li></ol></FONT><hr><FONT COLOR = "0000FF"><B>Comment: </B><BR><BR>First published Wed Jul 31, 1996; substantive revision Sun Aug 15, 2010; <a name="W257W"></a><A HREF = "https://plato.stanford.edu/archives/spr2011/entries/identity-indiscernible/" TARGET = "_top">Link</A>.<BR><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="2018-08-02T05:32" pubdate>02/08/2018 05:32:46</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>