A posteriori

Use of "A posteriori"
This term is commonly used in Philosophy / Logic and in Mathematics & Statistics. In philosophy it involves inductive reasoning from particular facts or logic requiring evidence for its support or validation and is open to revision. In Mathematics & Statistics it relates to 'posterior probability' meaning the probability assigned to some parameter or calculated from a prior probability.

The term infers causes from effects. This is the reverse of a 'priori reasoning' which is presupposed, independent of experience. Knowledge that is known to be true based on reason alone. A posteriori knowledge is more likely to be false, since it relies on an interpretation or understanding of an experience.

Examples of 'A posterior' knowledge
The terms "a priori" and "a posteriori" are used among philosophers to refer to two different types of knowledge. A posteriori knowledge is wisdom that we can have only after we have certain experiences. Whereas 'A priori' knowledge is wisdom that we can have "prior to experience".

A posteriori fact is concluded through a posteriori reasoning that involves facts observed in the world. For example, the fact that Anne has blonde hair would be an a posteriori truth, based on a posteriori reasoning. However, like all a posteriori knowledge, this statement could be false. With hindsight you could learn that her hair was dyed.

A posteriori

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