There is a vast area of symptoms and phenomena that appear in the organism, which concern both the medical clinic and the psychoanalytic clinic. Both approach the pathological thing through the symptom, but they cut away different reals and propose incidents and differential treatments of the body and the jouissance. In consequence, it turns out necessary to approach a differential study of the notion of symptom, organized concerning the semiologycal-sign and concerning the letter respectively. The psychoanalytic clinic is neither excluded nor opposed to the medical clinic; on the contrary, it continues it. The psychoanalysis returns the condition of the truth and of jouissance of the symptom that the speech of the science elides. The knowl...