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'fragments/reports', 'Knowledge and the State of Nature' and 'Unpublished Notebooks 1885-86'
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3 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 / C. Ontology of Logic / 1. Ontology of Logic
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Logic is a fiction, which invents the view that one thought causes another [Nietzsche]
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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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