Abstract
In his philosophical structure, Descartes intended to organize, on the basis of mathematics, an efficient method of certainty for research and philosophy. The Mathesis is a body of universal and necessary truths of order and connection between ideas. According to Descartes' epistemology, man has become a researcher and discoverer who must discover himself. For Descartes, certain knowledge is possible, and in his structural cognitive style, action is a function of the form, while Dewey's cognitive style is a function in which form is a function of action and behavior. Examining the consequences of Darwinian views of the world, Dewey rejects Descartes' view: The question of the possibility of human knowledge has been fundamentally wrong. Dewey, by looking again at the absolute, the unconditional, and the certain, in philosophy, sees it only as a means to use if it results in success. Philosophy is not merely a mental organization of eternal and absolute truth, but a technology, method, and technique to be a means for social reform, regulation, and improvement of human and societal behavior.