PHL100Y1 Lecture Notes - Lecture 4: Modus Tollens, Modus Ponens, Begging
Document Summary
September 26, 2017: analogy between organ + soul. If it"s performing properly, it is virtue (good: a soul"s function. Interpreted as soul doing its job well. Will it make you happy: end of book i explains that socrates isn"t satisfied because he isn"t sure as to what justice is. General form of argument: modus ponens (the way of putting) A sentence or proposition can be true or false: modus tollens. If p then q, q _____, there p. Pick out consequent q; and assert it to be true. Antecedent is true: denying the antecedent. If p then q, not p, therefore not q: trading on ambiguity or imprecision (outdoing, begging the question. Irony: ad hominem (insulting another person, speeches vs. Intristic: good is an ambiguous term, refer to 367d in edition. Purely good: good purely in itself, being useful is besides the point.
