Combining Philosophers
Ideas for Herodotus, Keith Devlin and Jeff McMahan
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3 ideas
4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
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'No councillors are bankers' and 'All bankers are athletes' implies 'Some athletes are not councillors' [Devlin]
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4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic
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Modern propositional inference replaces Aristotle's 19 syllogisms with modus ponens [Devlin]
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4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL
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Predicate logic retains the axioms of propositional logic [Devlin]
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