Combining Texts

All the ideas for 'Sisyphus (lost)', 'Foundations of Two-Dimensional Semantics' and 'Gentzen's Analysis of First-Order Proofs'

expand these ideas     |    start again     |     specify just one area for these texts

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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 / H. Proof Systems / 4. Natural Deduction

13823

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

19. Language / C. Assigning Meanings / 10. Two-Dimensional Semantics

14739

'Water' is two-dimensionally inconstant, with different intensions in different worlds [Chalmers, by Sider]