Combining Texts

All the ideas for 'fragments/reports', 'Investigations into Logical Deduction' and 'Letters to Schlick'

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

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4 ideas

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

13832

Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking]

9. Objects / E. Objects over Time / 8. Continuity of Rivers

579	Cratylus said you couldn't even step into the same river once [Cratylus, by Aristotle]

13. Knowledge Criteria / D. Scepticism / 1. Scepticism

578	Cratylus decided speech was hopeless, and his only expression was the movement of a finger [Cratylus, by Aristotle]

19. Language / F. Communication / 6. Interpreting Language / a. Translation

18285

All translation loses some content (but language does not create reality) [Carnap]