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'fragments/reports', '' and 'Interview with Baggini and Stangroom'
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5 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
11211
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If a sound conclusion comes from two errors that cancel out, the path of the argument must matter [Rumfitt]
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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
6023
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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 / 2. Logical Connectives / a. Logical connectives
11212
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The sense of a connective comes from primitively obvious rules of inference [Rumfitt]
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11210
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Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]
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