But either not q or not s;Lincoln is dead Therefore, Lincoln was shot The FORM IS If Lincoln was shot, then Lincoln is dead Lincoln is dead Therefore, Lincoln was shot 1 IF P , THEN Q Q Therefore P NEXT We go from FORM back to ARGUMENT IF P , THEN Q Q Therefore P IF Ed passes Phil 101, then Ed has perfect attendance===== If P, then Q If Q, then R Therefore, if P, then R ===== P → Q Q → R P → R 1 Disjunctive Syllogism (DS) Either Ralph walked the dog or he stayed home Ralph did not walk the dog Therefore, he stayed home ============================== Either P or Q Not P Therefore, Q ============================== P v Q ~P Q 1 Solved Consider The Argument Form P Rightarrow Tilde Q Q Chegg Com If p then q q therefore p
