Rigidity, occasional identity and Leibniz' law
Philosophical Quarterly 50 (201):518-526 (2000)
| Abstract | André Gallois (1998) attempts to defend the occasional identity thesis (OIT), the thesis that objects which are distinct at one time may nonetheless be identical at another time, in the face of two influential lines of argument against it. One argument involves Kripke’s (1971) notion of rigid designation and the other, Leibniz’s law (affirming the indiscernibility of identicals). It is reasonable for advocates of (OIT) to question the picture of rigid designation and the version of Leibniz’s law that these arguments employ, but, the problem is, some form of rigidity is required for one to affirm the occasional identity of objects, and some (restricted) version of Leibniz’s law must be conceded if identity really is involved. Gallois accordingly recommends an account of rigidity and a version of Leibniz’s law to this end.1 We find Gallois’ proposals entirely inadequate to their task. We aim in this paper is to explicate and defend an alternative approach for occasional identity theorists. We do not seek to defend (OIT) per se; our aim, rather, is simply to show that the arguments from rigid designation and Leibniz’s law are inconclusive. Let’s begin with an outline of these arguments | |||||||||
| Keywords | occasional identity Gallois | |||||||||
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Gonzalo Rodriguez-Pereyra (2004). Leibniz's Argument for the Identity of Indiscernibles in Primary Truths. In M. Carrara, A. M. Nunziante & G. Tomasi (eds.), Individuals, minds and bodies: themes from Leibniz. Franz Steiner Verlag.
Harold W. Noonan (1980). Objects and Identity: An Examination of the Relative Identity Thesis and its Consequences. Distributors for the U.S. And Canada [by] Kluwer Boston.
Murali Ramachandran (1993). Restricted Rigidity: The Deeper Problem. Mind 102 (405):157-158.
André Gallois (2011). Occasional Identity: Thereby Hangs the Tale. Analytic Philosophy 52 (3):188-202.
André Gallois (1990). Occasional Identity. Philosophical Studies 58 (3):203 - 224.
André Gallois (1998). Occasions of Identity: A Study in the Metaphysics of Persistence, Change, and Sameness. Oxford University Press.
Ralf M. Bader (2012). The Non-Transitivity of the Contingent and Occasional Identity Relations. Philosophical Studies 157 (1):141-152.
Murali Ramachandran (1992). On Restricting Rigidity. Mind 101 (401):141-144.
Murali Ramachandran (2000). Rigidity, Occasional Identity and Leibniz' Law. Philosophical Quarterly 50 (201):518 - 526.
Theodore Sider (2001). Occasions of Identity André Gallois. [REVIEW] British Journal for the Philosophy of Science 52 (2):401-405.
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