Combining Texts

All the ideas for 'works', 'Letters to Leibniz' and 'Abstraction Reconsidered'

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7 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

16519

No one can conceive of a possible substance, apart from those which God has created [Arnauld]

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

6. Mathematics / C. Sources of Mathematics / 4. Mathematical Empiricism / c. Against mathematical empiricism

10735

Abstraction from objects won't reveal an operation's being performed 'so many times' [Geach]

15. Nature of Minds / C. Capacities of Minds / 5. Generalisation by mind

10732

If concepts are just recognitional, then general judgements would be impossible [Geach]

18. Thought / D. Concepts / 3. Ontology of Concepts / b. Concepts as abilities

10731

For abstractionists, concepts are capacities to recognise recurrent features of the world [Geach]

18. Thought / E. Abstraction / 8. Abstractionism Critique

10733

The abstractionist cannot explain 'some' and 'not' [Geach]

10734

Only a judgement can distinguish 'striking' from 'being struck' [Geach]