  In another way, however, the categories are also studied in logic, not in metaphysics, because they are mental concepts, and logic is concerned with the proper analysis of concepts to determine their form and with the proper arrangement of concepts to determine their relations. But this is not the whole story, for Suárez also speaks of the ten supreme genera, and the study of these belongs to metaphysics. Moreover, there is also another important point, which is made explicit in the following text: