Combining Philosophers

Ideas for Melvin Fitting, Aristotle and Michael Williams

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4 ideas

5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

3599	Deduction shows entailments, not what to believe [Williams,M]

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

12376

Demonstrations by reductio assume excluded middle [Aristotle]

5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic

11033

Predications of predicates are predications of their subjects [Aristotle]

5. Theory of Logic / A. Overview of Logic / 8. Logic of Mathematics

11026

Classical logic is deliberately extensional, in order to model mathematics [Fitting]