Joshua Norton
University of California, Irvine
Some authors have attempted to defend Leibniz's identity of indicernibes through weak discernibility. The idea is that if there is a symmetric, non-reflexive physical relation which holds between two particles, then those particles cannot be identical. In this paper I focus only on Muller and Saunders' account and argue that the means by which they achieve weak discernibility is not through a physical observable but an alternate mathematical construction which is both unorthodox and incomplete. Muller and Saunders build a map from numbers to a set of observables and out of this map construct a weakly discerning formal relation. What Muller and Saunders' do not provide is a worked out account of how such maps pick out physical relations between particles.
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DOI 10.1086/683647
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References found in this work BETA

Discerning Fermions.Simon Saunders & F. A. Muller - 2008 - British Journal for the Philosophy of Science 59 (3):499 - 548.
Quantum Physics and the Identity of Indiscernibles.Steven French & Michael Redhead - 1988 - British Journal for the Philosophy of Science 39 (2):233-246.
Physics and Leibniz's Principles.Simon Saunders - 2003 - In Katherine Brading & Elena Castellani (eds.), Symmetries in Physics: Philosophical Reflections. Cambridge University Press. pp. 289--307.
Grades of Discriminability.W. V. Quine - 1976 - Journal of Philosophy 73 (5):113-116.

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Identity and Individuality in Quantum Theory.Steven French - 2008 - Stanford Encyclopedia of Philosophy.

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