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'fragments/reports', 'The Scientific Image' and 'Propositions'
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4 ideas
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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5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive
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Maybe proper names have the content of fixing a thing's category [Bealer]
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5. Theory of Logic / F. Referring in Logic / 2. Descriptions / b. Definite descriptions
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The four leading theories of definite descriptions are Frege's, Russell's, Evans's, and Prior's [Bealer]
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