Combining Texts

Ideas for 'Commentary on 'De Anima'', 'Inexpressible Properties and Propositions' and 'Set Theory and Its Philosophy'

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3 ideas

5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic

10704

We can formalize second-order formation rules, but not inference rules [Potter]

5. Theory of Logic / G. Quantification / 4. Substitutional Quantification

17988

Quantification can't all be substitutional; some reference is obviously to objects [Hofweber]

5. Theory of Logic / H. Proof Systems / 3. Proof from Assumptions

10703

Supposing axioms (rather than accepting them) give truths, but they are conditional [Potter]