| A | B |
|---|
| extension | sum of all individual objects described by it |
| intension | sum of all common attributes denoted by the term |
| difference | descriptive terms that distinguish that term from every other term |
| statement | sentence that is either true or false |
| self-supporting statement | statement whose truth value can be determined from the statement itself |
| self-reports | statement by a person concerning his or her own desires, beliefs, or feelings |
| tautology | statement that is always true by logical structure |
| self-contradiction | statement that is false by logical structure |
| supported statements | statement whose truth value depends on evidence or information from outside itself |
| deduction | conclusion based on other statements |
| consistent | two statements are true at the same time |
| implication | truth of one statement requires the truth of the other |
| logical equivalent | two statements imply one another |
| independent | the truth or falsity of one statement has no effect on the truth or falsity of the other |
| real disagreement | actual inconsistency between two statements; they cannot both be true at the same time |
| apparent disagreement | difference of opinion or perception |
| verbal disagreement | misunderstanding due to differing definitions for one or more words |
