 Before closing the presentation of the standard view, we should highlight a potential problem already implicit in our presentation. As we stressed, the basic concept of a priori justification is of justification that is independent of experience. The standard view recognizes that one typically needs experience to understand a proposition, and interprets experience independent justification as justification that requires no additional experience. But consider an experience like this. You believe a mathematical proposition is true, but solely on a teacher’s testimony. You do not know for yourself. But then after turning the proposition over in your mind for a while, perhaps by thinking through some examples, you “get it”; you “see” that the proposition is indeed true (see Bealer 2000).