For if one removes from our experiences every thing that belongs to the senses, there still remain certain original concepts and the judgments generated from them, which must have arisen entirely a priori, independently of experience, because they make one able to say more about the objects that appear to the senses than mere experience would teach, or at least make one believe that one can say this, and make assertions contain true universality and strict necessity, the likes of which merely empirical cognition can never afford.