On some putative graph-theoretic counterexamples to the principle of the identity of indiscernibles

Rafael De Clercq

pp. 661-672

in: Synthese 187 (2), 2012.

Abstract

Recently, several authors have claimed to have found graph-theoretic counterexamples to the Principle of the Identity of Indiscernibles (PII). In this paper, I argue that their counterexamples presuppose a certain view of what unlabeled graphs are, and that this view is optional at best.