| Adj. | 1. | a posteriori - involving reasoning from facts or particulars to general principles or from effects to causes; "a posteriori demonstration" synthetical, synthetic - of a proposition whose truth value is determined by observation or facts; "`all men are arrogant' is a synthetic proposition" inductive - of reasoning; proceeding from particular facts to a general conclusion; "inductive reasoning" a priori - involving deductive reasoning from a general principle to a necessary effect; not supported by fact; "an a priori judgment" |
| 2. | a posteriori - requiring evidence for validation or support | |
| Adv. | 1. | a posteriori - derived from observed facts a priori - derived by logic, without observed facts |