sentences:  For Vaz Ferreira, the difference between scientific inquiry and the world is revealed by the attribution to the former of an instrumental character, a distinction that runs against the positivism of the philosopher's formative years.Whereas science is instrumental and limited, philosophy is a form of inclusive knowledge that recognizes the shortcomings of systematic thought; philosophy is that which establishes the limitations as well as the boldness of the sciences, and it is the role of philosophy to integrate all human knowledge.The philosophical understanding of science corresponds not to a formal scheme but to a gradual process, in which the objects of scientific inquiry are assessed independently and inclusively.