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Ideas for 'Unconscious Cerebral Initiative', 'First-Order Logic' and 'Necessary Beings'

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2 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

10282

Logic is the study of sound argument, or of certain artificial languages (or applying the latter to the former) [Hodges,W]

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

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