 How Kant’s “experiment” functions with regard to our everyday knowledge is well-known. His Copernican hypothesis (Bxvi f) is that experience is relative to the standpoint and capacities of the observer. Only on this basis, Kant contends, can we find an explanation for the a priori structure of that experience (for example, its temporality or causal connectedness). The alternative, that we take a “single standpoint” and do not distinguish between objects of experience and those that are “merely thought… beyond the bounds of experience” (i.e., things-in-themselves), fails because it results in “an unavoidable conflict of reason with itself” (Bxviii n)—for example, in the Antimonies mentioned above (§1.3), Kant argues that the failure to separate appearances (everyday items of experience) from things-in-themselves (metaphysical entities that lie beyond experience) leads us to dramatically contradictory conclusions.