Combining Texts
Ideas for
'On the Philosophy of Logic', 'Difficulties of Transfinite Numbers and Types' and 'On the Source of Necessity'
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3 ideas
4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / g. System S4
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S4 says there must be some necessary truths (the actual ones, of which there is at least one) [Cameron]
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4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic
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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
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Fuzzy logic has many truth values, ranging in fractions from 0 to 1 [Fisher]
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