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Ideas for 'Intro to Naming,Necessity and Natural Kinds', 'Necessary Beings' and 'Logic [1897]'

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5 ideas

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

19296

If second-order variables range over sets, those are just objects; properties and relations aren't sets [Hale]

5. Theory of Logic / C. Ontology of Logic / 4. Logic by Convention

19289

Maybe conventionalism applies to meaning, but not to the truth of propositions expressed [Hale]

5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive

5829	We refer to Thales successfully by name, even if all descriptions of him are false [Schwartz,SP]

5830	The traditional theory of names says some of the descriptions must be correct [Schwartz,SP]

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

19298

Unlike axiom proofs, natural deduction proofs needn't focus on logical truths and theorems [Hale]