MODR 1711 Lecture Notes - Lecture 17: Obversion, Middle Term, Syllogism
4 Oct 2017
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Material on test: immediate deductions (5 questions, conversion: convert (switch s and p, obversion: negate (both predicate and copula, contraposition: convert and negate (switch and negate s and p) All non-s is not non-p - e proposition: all non-p is not non-s (equivalent, all non-s is non-non p (equivalent, all non-non p is not non-non s (not equivalent, square of opposition (5-8 questions) Review diagonal rule for false corners (for sure on the test) Subalternates: top to bottom: categorical syllogisms (questions) State valid or invalid (if invalid, explain why with the fallacy or explanation) If it is given in no s is p (no formulation) turn it into all s is not p. Review method of rules (will be indicated next to statements) Distribution: subject (a and e) predicate (e and o) Anything distributed in the conclusion should be distributed in the premise. Any weakness up to (some or are not) must be re ected below (in the conclusion)
