Combining Texts

Ideas for 'Unconscious Cerebral Initiative', 'The Essence of Reference' and 'Necessary Beings'

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6 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 / e. Empty names

10429

It is best to say that a name designates iff there is something for it to designate [Sainsbury]

5. Theory of Logic / F. Referring in Logic / 2. Descriptions / b. Definite descriptions

10425

Definite descriptions may not be referring expressions, since they can fail to refer [Sainsbury]

10438

Definite descriptions are usually rigid in subject, but not in predicate, position [Sainsbury]

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]