Ideas from 'The Identity of Indiscernibles' by Max Black [1952], by Theme Structure

[found in 'Metaphysics - An Anthology' (ed/tr Sosa,E. /Kim,J.) [Blackwell 1999,0-631-20279-x]].

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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX
The Axiom of Choice needs a criterion of choice
9. Objects / A. Existence of Objects / 4. Individuation / b. Individuation by properties
Two things can only be distinguished by a distinct property or a distinct relation
9. Objects / F. Identity among Objects / 5. Self-Identity
The 'property' of self-identity is uselessly tautological
9. Objects / F. Identity among Objects / 7. Indiscernible Objects
If the universe just held two indiscernibles spheres, that refutes the Identity of Indiscernibles