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Ideas for 'fragments/reports', 'Gentzen's Analysis of First-Order Proofs' and 'The Philosophy of Logical Atomism'

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5. Theory of Logic / E. Structures of Logic / 1. Logical Form

6092	In a logically perfect language, there will be just one word for every simple object [Russell]

6101	Romulus does not occur in the proposition 'Romulus did not exist' [Russell]

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

13825

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