Combining Texts

All the ideas for 'Sisyphus (lost)', 'On the Frame of Reference' and 'Gentzen's Analysis of First-Order Proofs'

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4 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 / 2. Logical Connectives / a. Logical connectives

13825

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

5. Theory of Logic / G. Quantification / 4. Substitutional Quantification

10009

Substitutional quantification is just a variant of Tarski's account [Wallace, by Baldwin]

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

13823

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