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Ideas for 'fragments/reports', 'Review of Husserl's 'Phil of Arithmetic'' and 'The Identity of Indiscernibles'

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2 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL

9585	Since every definition is an equation, one cannot define equality itself [Frege]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX

10196

The Axiom of Choice needs a criterion of choice [Black]