PHIL 1000 Lecture Notes - Material Conditional, Modus Tollens, Modus Ponens

• School: York University
• Department: Philosophy
• Course: PHIL 1000
• Professor: David Stamos

Document Summary

I. e. modus ponens famous form of deductive argument p => q p thus, q. I. e. modus tollens (if it is raining outside, my car is wet; if it is not raining outside therefore my car is not wet) [~ not; => if __ then __ ] p => q. I. e. disjunctive syllogism [v= or; ~ not] p v q. = and] p p => q q => r i. e. r => ~p thus, p . I. e. affirming the consequent (if p then q) p => q q thus, p. I. e. denying the antecedent (i. e. if it"s raining outside, then my car is wet/ it"s not raining outside/ thus my car is not wet) p => q. Opinion point of view on something; you can have opinion on anything. Argument one or more premises supporting a conclusion; when you give statements to back up the truth of the conclusion. Premises are statements; they are either true or false.