There are many points of view on these two types of knowledge, and their relationship is one of the oldest problems in modern philosophy. The terms a priori and a posteriori are primarily used as adjectives to modify the noun knowledge (for example, a priori knowledge).ant states, although all our cognition begins with experience, it does not follow that it arises from experience According to Kant, a priori cognition is transcendental, or based on the form of all possible experience, while a posteriori cognition is empirical, based on the content of experience.