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Ideas for 'Necessary Existents', 'Of the standard of taste' and 'Philosophy of Logic'

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5 ideas

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

18954

Before the late 19th century logic was trivialised by not dealing with relations [Putnam]

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

18956

Asserting first-order validity implicitly involves second-order reference to classes [Putnam]

5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic

18962

Unfashionably, I think logic has an empirical foundation [Putnam]

5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic

18961

We can identify functions with certain sets - or identify sets with certain functions [Putnam]

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

18955

Having a valid form doesn't ensure truth, as it may be meaningless [Putnam]