PHL101Y1 Lecture Notes - Lecture 2: Indicative Conditional, Lewis Carroll, Kevin Pillar
Document Summary
Wednesday september 12th, 2018: let us begin by distinguishing necessary and sufficient conditions: Indicative mood: stating things as if they are facts (ex. Note that this does not mean that the propositions are actually true, propositions can be either true or false. Attaching a conditional clause to the statement will make it an indicative conditional statement (ex. The door is open if i open it) A proposition p is a necessary condition for a proposition q when q cannot be true without p"s also being true: example: that jim is from texas (p) is necessary for his being from dallas (q). Note: (1) if p is a necessary condition for q, then q is a sufficient condition for p, and vice versa. If jim being from texas is necessary for his being from dallas, then his being from. Dallas is sufficient for him being from texas.
