Combining Texts
Ideas for
'A Short History of Ethics', 'Prior Analytics' and 'Axiomatic Theories of Truth'
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11 ideas
4. Formal Logic / A. Syllogistic Logic / 1. Aristotelian Logic
22271
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Aristotle was the first to use schematic letters in logic [Aristotle, by Potter]
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11060
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Aristotelian syllogisms are three-part, subject-predicate, existentially committed, with laws of thought [Aristotle, by Hanna]
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18909
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Aristotelian sentences are made up by one of four 'formative' connectors [Aristotle, by Engelbretsen]
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8080
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Aristotelian identified 256 possible syllogisms, saying that 19 are valid [Aristotle, by Devlin]
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13912
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Aristotle replaced Plato's noun-verb form with unions of pairs of terms by one of four 'copulae' [Aristotle, by Engelbretsen/Sayward]
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8071
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Aristotle listed nineteen valid syllogisms (though a few of them were wrong) [Aristotle, by Devlin]
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4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
13819
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Aristotle's said some Fs are G or some Fs are not G, forgetting that there might be no Fs [Bostock on Aristotle]
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4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
9403
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There are three different deductions for actual terms, necessary terms and possible terms [Aristotle]
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4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic
16335
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In Strong Kleene logic a disjunction just needs one disjunct to be true [Halbach]
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16334
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In Weak Kleene logic there are 'gaps', neither true nor false if one component lacks a truth value [Halbach]
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4. Formal Logic / F. Set Theory ST / 1. Set Theory
16309
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Every attempt at formal rigour uses some set theory [Halbach]
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