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Ideas for 'Axiomatic Theories of Truth', 'Four Dimensionalism' and 'Introduction to the Philosophy of Mathematics'

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4 ideas

4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic

17926

Rejecting double negation elimination undermines reductio proofs [Colyvan]

17925

Showing a disproof is impossible is not a proof, so don't eliminate double negation [Colyvan]

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

16335

In Strong Kleene logic a disjunction just needs one disjunct to be true [Halbach]

16334

In Weak Kleene logic there are 'gaps', neither true nor false if one component lacks a truth value [Halbach]