[Ibn Sīnā or the control of medical reasoning]

This article analyses the context in which Ibn Sīnā produced his works and the terminologic and conceptual material used by him to write his medical and philosophical texts and to become generally acknowledged as a sage or learned scholar. Between the prince and the theologian, he is a physician-philosopher who uses reason to create his own space. The Qānūn fī'l-tibb is the consequent expression of medical reasoning typical of the early XI century; if, on one hand, it is indebted to objective conditions, we remark also that it is structured around an epistemological project which organizes its expression and transmits its knowledge in a technical, codified language.