Combining Philosophers

All the ideas for H.Putnam/P.Oppenheim, Leopold Kronecker and Peter (Pyotr) Kropotkin

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4 ideas

6. Mathematics / A. Nature of Mathematics / 1. Mathematics

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All of mathematics is properties of the whole numbers [Kronecker]

6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / c. Priority of numbers

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God made the integers, all the rest is the work of man [Kronecker]

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]

25. Social Practice / B. Equalities / 1. Grounds of equality

20486

Only liberty, equality and sympathy can stand up to anti-social people [Kropotkin]