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'fragments/reports', 'My Philosophical Development' and 'Ideas: intro to pure phenomenology'
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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 / E. Structures of Logic / 1. Logical Form
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Leibniz bases everything on subject/predicate and substance/property propositions [Russell]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / e. Empty names
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Names are meaningless unless there is an object which they designate [Russell]
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