Combining Texts

All the ideas for 'Mathematics without Numbers', 'Logic [1897]' and 'Slaughterhouse Five'

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5 ideas

6. Mathematics / B. Foundations for Mathematics / 7. Mathematical Structuralism / c. Nominalist structuralism
Modal structuralism says mathematics studies possible structures, which may or may not be actualised [Hellman, by Friend]
Statements of pure mathematics are elliptical for a sort of modal conditional [Hellman, by Chihara]
Modal structuralism can only judge possibility by 'possible' models [Shapiro on Hellman]
13. Knowledge Criteria / C. External Justification / 2. Causal Justification
Psychological logic can't distinguish justification from causes of a belief [Frege]
16. Persons / F. Free Will / 5. Against Free Will
Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut]