Nevertheless there must always be something striking about this anticipation of perception for a researcher who has become accustomed to transcendental consideration and thereby become cautious, and some reservation is aroused about the fact that the understanding can antici pate a synthetic proposition of the sort which that concerning the de gree of everything real in appearance is, and thus about the possibility a Menge Menge of the inner variation of the sensation itself if one abstracts from its em pirical quality, and it is therefore a question not unworthy of solution, how the understanding can assert something synthetic a priori about ap pearances, and indeed anticipate them in that which is really merely empirical, namely what pertains to sensation.