APRIORISMOEl apriorism is a form of knowledge studied since ancient philosophers up to modern philosophy. It is understood that he has had a changing sense in each of them. Even so, the concept can be generalized given occurrences of thought. Authors such as Descartes, Locke, Leibniz, Hume, Hegel and Kant, among others agree that the term is the first knowledge that we have of things.