Combining Texts
Ideas for
'A Theory of Universals', 'Philosophical Logic: Intro to Advanced Topics' and 'On Motion'
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5 ideas
4. Formal Logic / A. Syllogistic Logic / 1. Aristotelian Logic
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13913
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The four 'perfect syllogisms' are called Barbara, Celarent, Darii and Ferio [Engelbretsen/Sayward]
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13914
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Syllogistic logic has one rule: what is affirmed/denied of wholes is affirmed/denied of their parts [Engelbretsen/Sayward]
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4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
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13915
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Syllogistic can't handle sentences with singular terms, or relational terms, or compound sentences [Engelbretsen/Sayward]
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4. Formal Logic / A. Syllogistic Logic / 3. Term Logic
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13916
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Term logic uses expression letters and brackets, and '-' for negative terms, and '+' for compound terms [Engelbretsen/Sayward]
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4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / g. System S4
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15544
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If what is actual might have been impossible, we need S4 modal logic [Armstrong, by Lewis]
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