| A | B |
|---|
| conjecture | educated guess |
| counterexample | an example that proves a conjecture false |
| conjunction | compound statement joined by "and" |
| disjunction | compound statement joind by "or" |
| v | or |
| ^ | and |
| conditional statement | "If...., then..." |
| hypothesis | phrase immediately following "if" |
| conclusion | phrase immediately following "then" |
| converse | switching the hypothesis and conclusion |
| inverse | negating both the hypothesis and conclusion |
| contrapositive | switching and negating both hypothesis and conclusion of orginal statement |
| postulate | basic relationships accepted as true without proof |
| theorem | statement or conjecture that has been proven true |
| proof | logical argument in which statements made are supported by reasons |
| Law of Syllogism | p-> q, q -> r, p -> r |
| Law of Detachment | p -> q, p is true, therefore q is true |
