Combining Texts
Ideas for
'Counterpart theory and Quant. Modal Logic', 'What is Cantor's Continuum Problem?' and 'On the Philosophy of Logic'
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4 ideas
4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic
8943
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Three-valued logic says excluded middle and non-contradition are not tautologies [Fisher]
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4. Formal Logic / E. Nonclassical Logics / 4. Fuzzy Logic
8945
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Fuzzy logic has many truth values, ranging in fractions from 0 to 1 [Fisher]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets
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We perceive the objects of set theory, just as we perceive with our senses [Gödel]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / o. Axiom of Constructibility V = L
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Gödel proved the classical relative consistency of the axiom V = L [Gödel, by Putnam]
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