  For realist phenomenologists, the distinction between a priori and a posteriori knowledge has to do with the kind of object studied and not (as for the later Husserl) with any special epistemological technique such as that of epoché or transcendental reduction. Reinach credited the possibility of a priori knowledge to certain special features (necessity, universality, timelessness, intelligibility) of the corresponding objects of knowledge (which are in Reinach's eyes certain kinds of states of affairs and associated essences or natures). Thus, Reinach writes