A priori proposition

A priori propositions have traditionally been defined as those which can be known independent of experience. A priori propositions can be contrasted to a posteriori propositions; the later being those which are gained through experience. An alternative definition of a priori propositions, which is popular among many contemporary philosophers, makes the distinction that rather than being completely independent or prior to experience, an a priori proposition is one whose truth can be grasped "without any justification from the character of the subject's experience". The reason for the alternative definition can be explained in the following manner: "Experience may be a precondition of coming to know a prior truths, but those truths nevertheless have a justification, and can also be justified for the thinker, independently of experience."

- P. Boghossian & C. Peacocke