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Ideas for 'Letters to Edward Stillingfleet', 'Philosophy of Logic' and 'In Praed.'

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2 ideas

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

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]