Combining Philosophers
Ideas for Melvin Fitting, Frances A. Yates and Keith Devlin
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7 ideas
4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
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'No councillors are bankers' and 'All bankers are athletes' implies 'Some athletes are not councillors' [Devlin]
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4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic
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Modern propositional inference replaces Aristotle's 19 syllogisms with modus ponens [Devlin]
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4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL
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Predicate logic retains the axioms of propositional logic [Devlin]
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4. Formal Logic / E. Nonclassical Logics / 8. Intensional Logic
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If terms change their designations in different states, they are functions from states to objects [Fitting]
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15376
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Intensional logic adds a second type of quantification, over intensional objects, or individual concepts [Fitting]
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4. Formal Logic / E. Nonclassical Logics / 9. Awareness Logic
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Awareness logic adds the restriction of an awareness function to epistemic logic [Fitting]
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4. Formal Logic / E. Nonclassical Logics / 10. Justification Logics
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Justication logics make explicit the reasons for mathematical truth in proofs [Fitting]
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