 In all of its forms, pluralism about conceptual structure recognizes that concepts have diverse functions and that a corresponding variety of types of representations are needed to fulfill these functions. These same considerations have led some theorists to advocate concept eliminativism—the view that there are no concepts (Machery 2009). The reasoning behind concept eliminativism is that concept should be understood to be a natural kind if concepts exist at all, and that natural kinds ought to have significant commonalities that can be discovered using empirical methods, including commonalities that go well beyond the criteria that are initially used to characterize them. But according to concept eliminativists, there are no such commonalities that hold among the types of representations that pluralists embrace. Perhaps we need prototypes and theories and other types of representations for distinct higher-level cognitive processes, but they are too diverse to warrant the claim that they constitute a single kind. On this view, then, we should simply abandon the theoretical construct of a concept and refer only to more fine-grained types of representations, such as prototypes and theories. Opponents of concept eliminativism have responded to the eliminativist’s challenge in a number of ways. Some have argued that Machery’s criteria for elimination are simply too strong and that concept, understood as a higher-level kind or perhaps a functional kind, has great utility in psychological models of cognitive processes (e.g., Hampton 2010, Lalumera 2010, Strohminger &amp; Moore 2010). Others have argued that Machery’s criteria for something’s being a natural kind are too restrictive and that his view would have the consequence of ruling out clear cases of legitimate higher-level kinds in science generally (e.g., Gonnerman &amp; Weinberg 2010, Margolis &amp; Laurence 2010). And others have argued that even if we grant Machery’s stringent criteria for being a natural kind, elimination wouldn’t follow, as concepts are natural kinds according to his criteria (Samuels &amp; Ferreira 2010, Weiskopf 2010). (For further critical discussion of eliminativism, see the peer commentary that appears with Machery 2010 and the author’s response.) 