Combining Texts

All the ideas for 'fragments/reports', 'On Truth and Lies in a Nonmoral Sense' and 'Investigations into Logical Deduction'

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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]

15. Nature of Minds / C. Capacities of Minds / 3. Abstraction by mind

20363

Leaves are unequal, but we form the concept 'leaf' by discarding their individual differences [Nietzsche]

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]