PHIL 200 Lecture 1: PHIL 200 notes
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>>key words: clarity in expression, rigor, thoroughness, intellectual generosity. Ourselves, our world, and our place in it. Q: if you"re human, then you"re mortal, you"re human valid, you"re mortal, if you"re human, then you"re mortal, you"re not mortal valid, you"re not human. * -q, -p: if you"re not mortal, then you"re not human, you"re human valid, you"re mortal. Even if they are valid they may not be sound. If p then q, p therefore q, modus ponens. If p then q, not q therefore not p modus tollens. Either a premise is false (or several are), Or the argument is invalid (c doesn"t follow from a and b), eg. ) all pigs can fly. Logic is concerned with whether there is no way the premises can be true and the conclusion false. Modus ponens-argument type: p, if p, then q, therefore, q. They stand for any preposition one can imagine,