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Ideas for 'Particulars in Particular Clothing', 'Gentzen's Analysis of First-Order Proofs' and 'The Theory of Knowledge'

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3 ideas

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

23476

Logical constants seem to be entities in propositions, but are actually pure form [Russell]

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We use logical notions, so they must be objects - but I don't know what they really are [Russell]

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Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]