Combining Texts

All the ideas for 'fragments/reports', 'Investigations into Logical Deduction' and 'Reference and Reflexivity'

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]

18. Thought / A. Modes of Thought / 9. Indexical Thought

16391

Indexical thoughts are about themselves, and ascribe properties to themselves [Perry, by Recanati]

26. Natural Theory / A. Speculations on Nature / 5. Infinite in Nature

1748	Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius]

27. Natural Reality / G. Biology / 3. Evolution

5989	Archelaus said life began in a primeval slime [Archelaus, by Schofield]