Combining Philosophers

All the ideas for H.Putnam/P.Oppenheim, Hilbert,D/Ackermann,W and Roger Bacon

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

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3 ideas

4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC

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The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]

14. Science / D. Explanation / 2. Types of Explanation / j. Explanations by reduction

20653

Six reduction levels: groups, lives, cells, molecules, atoms, particles [Putnam/Oppenheim, by Watson]

26. Natural Theory / D. Laws of Nature / 8. Scientific Essentialism / d. Knowing essences

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No one even knows the nature and properties of a fly - why it has that colour, or so many feet [Bacon,R]