Combining Texts

All the ideas for 'Sententia on 'De Caelo'', 'A Note on the entscheidungsproblem' and 'Introduction to Russell's Theory of Types'

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

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3 ideas

1. Philosophy / D. Nature of Philosophy / 5. Aims of Philosophy / a. Philosophy as worldly

22101

Philosophy aims to know the truth about the way things are [Aquinas]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility

18170

The Axiom of Reducibility is self-effacing: if true, it isn't needed [Quine]

5. Theory of Logic / K. Features of Logics / 7. Decidability

18758

Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee]