a posteriori

adjective

1. from particular instances to a general principle or law; based upon actual observation or upon experimental data: an a posteriori argument that derives the theory from the evidence.Compare a priori(def 1).
2. not existing in the mind prior to or independent of experience.Compare a priori(def 2).

adjective logic

1. relating to or involving inductive reasoning from particular facts or effects to a general principle
2. derived from or requiring evidence for its validation or support; empirical; open to revision
3. statistics See posterior probability

Latin, literally “from what comes after” (see posterior).