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Ideas for 'Particulars in Particular Clothing', 'Gentzen's Analysis of First-Order Proofs' and 'Mere Possibilities'

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5 ideas

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

13831

Logic is based on transitions between sentences [Prawitz]

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

16464

We regiment to get semantic structure, for evaluating arguments, and understanding complexities [Stalnaker]

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]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or

16465

In 'S was F or some other than S was F', the disjuncts need S, but the whole disjunction doesn't [Stalnaker]

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

13823

In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]