Combining Philosophers

Ideas for Numenius, Dicaearchus and David Bostock

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5 ideas

5. Theory of Logic / A. Overview of Logic / 5. First-Order Logic

18108

First-order logic is not decidable: there is no test of whether any formula is valid [Bostock]

18109

The completeness of first-order logic implies its compactness [Bostock]

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

13346

Truth is the basic notion in classical logic [Bostock]

13545

Elementary logic cannot distinguish clearly between the finite and the infinite [Bostock]

13822

Fictional characters wreck elementary logic, as they have contradictions and no excluded middle [Bostock]