 Objections to an evolutionary notion of medical malfunction do not show that there is anything wrong with the general idea of basing judgments of health and disease on a scientifically established picture of the normal functional decomposition of human beings. However, on this account, it becomes harder to retain the conservative project that looks for the natural phenomena that fall under, and are therefore constrained by, our folk concepts of health and disease. Wakefield, for instance, thinks some psychiatric diagnoses flout our intuitions by attributing disorder on the basis of behavior alone without looking for malfunctioning mental mechanisms (1997a). He appeals to intuitions to derive necessary and sufficient conditions for the folk concept of mental disorder, and assumes that science should search for the psychological processes that fit the concept thus defined. But it is one thing to take intuitions as a starting point, and another to say that they are hegemonic. Boorse, too, adduces everyday linguistic usage and commonsense intuitions as evidence, even though he claims to be discussing the clinical concepts of health and disease. 