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'fragments/reports', 'Philosophy of Logics' and 'Remarks on the definition and nature of mathematics'
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3 ideas
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
8078
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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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5. Theory of Logic / E. Structures of Logic / 8. Theories in Logic
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To study formal systems, look at the whole thing, and not just how it is constructed in steps [Curry]
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