PHIL 120 Lecture 5: PHIL 120 Week 3 Lecture 1
Document Summary
All false (p q) ~(p q) *in discussion activity and quiz, at least one of the problems - given some formula (ex. The ones above), you need to decide whether this formula is a tautology, a self-contradiction or a contingency. To go from only if to if, you need to swap the two variables. P only if q -> only if q then p -> if p then q. P just in case q -> p if and only if q -> p q.
