 The Reliability Challenge (Nozick 2001): If we are to be justified in believing modal statements, we must have a reliable faculty or a set of reliable faculties working together for forming beliefs of that sort, the existence of which is best explained by evolutionary theory. No ad hoc modality-detecting faculty is allowed for explaining modal knowledge. The Reliability Challenge instantiates the desiderata of what is sometimes called “anti-exceptionalism” in modal epistemology, according to which