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'fragments/reports', 'Outline of a System of Utilitarianism' and 'Intro to 'Philosophy of Logic''
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5 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
9457
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The two main views in philosophy of logic are extensionalism and intensionalism [Jacquette]
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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 / I. Semantics of Logic / 5. Extensionalism
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Extensionalists say that quantifiers presuppose the existence of their objects [Jacquette]
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5. Theory of Logic / I. Semantics of Logic / 6. Intensionalism
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Intensionalists say meaning is determined by the possession of properties [Jacquette]
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