Combining Texts
Ideas for
'fragments/reports', 'Identity through Possible Worlds' and 'On Referring'
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5 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 / 1. Logical Form
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There are no rules for the exact logic of ordinary language, because that doesn't exist [Strawson,P]
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5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions
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'The present King of France is bald' presupposes existence, rather than stating it [Strawson,P, by Grayling]
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Russell asks when 'The King of France is wise' would be a true assertion [Strawson,P]
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