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Ideas for 'fragments/reports', 'On Fate ('De fato')' and 'The Concept of Truth for Formalized Languages'

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5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence

21677

How can the not-true fail to be false, or the not-false fail to be true? [Cicero]

5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic

18759

Identity is invariant under arbitrary permutations, so it seems to be a logical term [Tarski, by McGee]