Combining Philosophers

Ideas for Craig Bourne, ystein Linnebo and Aristotle

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4 ideas

5. Theory of Logic / A. Overview of Logic / 4. Pure Logic

10781

A 'pure logic' must be ontologically innocent, universal, and without presuppositions [Linnebo]

10638

A pure logic is wholly general, purely formal, and directly known [Linnebo]

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]