Combining Texts

All the ideas for 'Foundations of Geometry', 'There is no a Priori' and 'Some Remarks on Essentialism'

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9 ideas

5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism

10053

Geometrical axioms imply the propositions, but the former may not be true [Russell]

6. Mathematics / B. Foundations for Mathematics / 3. Axioms for Geometry

10052

Geometry is united by the intuitive axioms of projective geometry [Russell, by Musgrave]

9. Objects / D. Essence of Objects / 7. Essence and Necessity / a. Essence as necessary properties

13952

Essentialism says some of a thing's properties are necessary, and could not be absent [Cartwright,R]

9. Objects / D. Essence of Objects / 14. Knowledge of Essences

13954

The difficulty in essentialism is deciding the grounds for rating an attribute as essential [Cartwright,R]

9. Objects / D. Essence of Objects / 15. Against Essentialism

13955

Essentialism is said to be unintelligible, because relative, if necessary truths are all analytic [Cartwright,R]

9. Objects / F. Identity among Objects / 3. Relative Identity

13953

An act of ostension doesn't seem to need a 'sort' of thing, even of a very broad kind [Cartwright,R]

12. Knowledge Sources / A. A Priori Knowledge / 4. A Priori as Necessities

9354	Why should necessities only be knowable a priori? That Hesperus is Phosporus is known empirically [Devitt]

12. Knowledge Sources / A. A Priori Knowledge / 9. A Priori from Concepts

9353	We explain away a priori knowledge, not as directly empirical, but as indirectly holistically empirical [Devitt]

12. Knowledge Sources / A. A Priori Knowledge / 11. Denying the A Priori

9356	The idea of the a priori is so obscure that it won't explain anything [Devitt]