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'fragments/reports', 'The Myth of the Given' and 'Whitehead and the Rise of Modern Logic'
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3 ideas
5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic
13639
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Quine says higher-order items are intensional, and lack a clearly defined identity relation [Quine, by Shapiro]
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5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
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Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]
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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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Every proposition is either true or false [Chrysippus, by Cicero]
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