Combining Texts

Ideas for 'Positivism and Realism', 'The Logical Basis of Metaphysics' 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 / E. Structures of Logic / 2. Logical Connectives / c. not

18801

Classical negation is circular, if it relies on knowing negation-conditions from truth-conditions [Dummett]

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]