<!DOCTYPE html><HTML lang="en"> <head><meta charset="utf-8"> <title>French (Steven) - Hacking Away at the Identity of Indiscernibles: Possible Worlds and Einstein's Principle of Equivalence (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_6456.htm">Hacking Away at the Identity of Indiscernibles: Possible Worlds and Einstein's Principle of Equivalence</A></th></tr> <tr><th><A HREF = "../../Authors/F/Author_French (Steven).htm">French (Steven)</a></th></tr> <tr><th>Source: Journal of Philosophy 92.9 (Sept. 1995), pp. 455-466</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_6456.htm">Paper Summary</A></td></tr></TABLE></CENTER></P> <hr><P><FONT COLOR = "0000FF"><U>Philosophers Index Abstract</U><FONT COLOR = "800080"><ol type="1">The long running debate over the conceptual status of Leibniz's Principle of the <a name="1"></a><A HREF="../../Notes/Notes_0/Notes_81.htm">Identity of Indiscernibles</A><SUP>1</SUP> has been given a new twist by Hacking, who suggests that the Principle is true, not in each possible world, but about all possible worlds. He supports this suggestion with a consideration of the underdetermination in our description of possible worlds which, it is claimed, lies at the heart of General Relativity. In the present paper, Hacking's argument is examined in detail and it is shown that reflection upon the foundations of space-time physics reveals that the argument is not well grounded. This is taken as further evidence of the difficulty in pulling metaphysical rabbits out of physical hats.</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>