The theoretical construction of nosologic categories plays a major role in medical rationality. Structured upon scientific models originated from the development of classical physics, medical knowledge is, however an irregular aggregate of disciplines where many of its fundamental notions are implicit, leading to the production of contradictions that cannot be overcome, both intemally and in it's relations to clinics. This paper analyses in detail some of the preconceptions of this rationality, attempting to outline the obstacles that they produce, which in tum hamper the fulfillment of the ethical goals of the therapeutic practices.
Epistemology; medical rationality; history of medicine