 Those who take the standard view might respond by accepting that rational intuition is an experience and distinguishing this experience from the experiences that are involved in empirical justification, i.e., perception, proprioception, introspection, and memory. This modified standard view could then maintain that a priori knowledge and justification are independent of the latter experiences, but not necessarily all experience; a priori justification can be grounded in an experience of rational intuition—perhaps it is always so grounded. Thus, on the modified standard view, the special role of understanding comes down to this: understanding an a priori proposition is the only prerequisite for rational insight into its truth; understanding the proposition does not guarantee that one will attain such insight, but it is the only thing that is necessary. Notice, on this modified standard view, self-evident propositions no longer play such a prominent role. It is not an essential part of the view that there are special propositions, and anyone who understands one of these propositions has propositional justification. If one wants to think in terms of special propositions, there will be propositions that are special only in an attenuated sense: it is possible for a person to have the experience of seeing the propositions to be true simply by understanding and thinking about them. Some might consider this modification too much of a departure from the spirit of the standard view.