Combining Philosophers

Ideas for H.Putnam/P.Oppenheim, William of Ockham and Alan Musgrave

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5 ideas

5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism

10061

The If-thenist view only seems to work for the axiomatised portions of mathematics [Musgrave]

10065

Perhaps If-thenism survives in mathematics if we stick to first-order logic [Musgrave]

5. Theory of Logic / G. Quantification / 1. Quantification

9106	The word 'every' only signifies when added to a term such as 'man', referring to all men [William of Ockham]

5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth

10050

A statement is logically true if it comes out true in all interpretations in all (non-empty) domains [Musgrave]

10049

Logical truths may contain non-logical notions, as in 'all men are men' [Musgrave]