province of philosophy. Gradually, the various natural and social sciences developed their own techniques of inquiry and split off from philosophy into separate disciplines. As a result of the diminished scientific content of the field, philosophy remained as a normative enterprise. In more recent philosophy of science, however, there is a trend to the naturalization of philosophy, termed cognitive naturalism, to the denial of theoretical boundary between philosophy and science. The paper has examined the main theoretical arguments and practical implications cognitive naturalism has proposed to develope in the fields of philosophy of science and education. In order to identify the philosophical views that have shaped cognitive naturalism, the author has traced back to the ideas(egs. naturalized epistemology, connectionism claiming for a neuroscientific view of knowledge) developed by some naturalists such as Quine and the Churchlands. Philosophy should be undertaken not a priori, they argued, but within the web of natural sciences such as psychology, cognitive science and neuroscience; the theory of philosophy should be pursued as an empirical discipline. It has been suggested that successful neuroscientific accounts of cognitive functioning offer the best prospect in integrating propositional knowledge(knowing that) and practical knowledge(knowing how).