Combining Philosophers
Ideas for Engelbretsen,G/Sayward,C, Brian Clegg and Francisco Surez
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15 ideas
4. Formal Logic / A. Syllogistic Logic / 1. Aristotelian Logic
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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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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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Term logic uses expression letters and brackets, and '-' for negative terms, and '+' for compound terms [Engelbretsen/Sayward]
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4. Formal Logic / F. Set Theory ST / 2. Mechanics of Set Theory / b. Terminology of ST
10859
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A set is 'well-ordered' if every subset has a first element [Clegg]
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4. Formal Logic / F. Set Theory ST / 3. Types of Set / d. Infinite Sets
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Set theory made a closer study of infinity possible [Clegg]
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10864
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Any set can always generate a larger set - its powerset, of subsets [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / b. Axiom of Extensionality I
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Extensionality: Two sets are equal if and only if they have the same elements [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / c. Axiom of Pairing II
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Pairing: For any two sets there exists a set to which they both belong [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / d. Axiom of Unions III
10876
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Unions: There is a set of all the elements which belong to at least one set in a collection [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / f. Axiom of Infinity V
10878
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Infinity: There exists a set of the empty set and the successor of each element [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / g. Axiom of Powers VI
10877
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Powers: All the subsets of a given set form their own new powerset [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / j. Axiom of Choice IX
10879
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Choice: For every set a mechanism will choose one member of any non-empty subset [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / k. Axiom of Existence
10871
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Axiom of Existence: there exists at least one set [Clegg]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / l. Axiom of Specification
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Specification: a condition applied to a set will always produce a new set [Clegg]
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