What does philosophy contribute to cognitive science. 1 There is no succinct answer to this question. Philosophers have been practicing cognitive science, in one form or another, for millennia. Cognitive science overlaps with philosophy in many of its mots central areas: the theory of knowledge, philosophy of mind, philosophy of language, logic. Most major topics within the other disciplines of cognitive science give rise to philosophical questions, and philosophers have found plenty of their own problems to worry about. And finally, philosophers disagree among themselves about most issues, so there is very little by way of current consensus to report. Rather than try to summarize the contributions that philosophy has made and is making to cognitive science, this chapter will try to describe the philosopher's methods. And some of the roles that philosophers play within cognitive science. Along the way, there should be enough examples that at least the general flavor of philosophy's contributions will be apparent.