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Ideas for 'fragments/reports', 'What is Logic?' and 'Philosophy of Logic'

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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

6023	Every proposition is either true or false [Chrysippus, by Cicero]

9024	Excluded middle has three different definitions [Quine]

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

10012

Quantification theory can still be proved complete if we add identity [Quine]