a priori

A priori is used to indicate in reasoning that the conclusions reached are based on matters already known, that is, prior knowledge whether actual or presumed.

An assertion that describes or relates to reasoning of concepts and/or ideas, which contemplates the effects of the original causes, or draws a conclusion based on what is known. It is demonstrative of deductive reasoning.

[Latin: from what comes before; from the previous (as a cause or effect)]

Usage: Factors affecting the formation of a contract will absolve a contracting party from a priori contractual rights and obligations, when it is held to be void ab initio.

Related Words: a posteriori; a fortiori; ipso facto.