Philosophers have always been concerned with method. Some, like Kant, have been very interested in it; and some, like Descartes, have been almost obsessed by it. It is, nevertheless, true that such questioning is worth while only if it can be brought into contact with particular philosophical problems. As a start it should certainly be noted that the contrast between philosophy and science is of primary concern only to that part of philosophy which deals with theoretical claims and is generally called theory of knowledge. The aim in this chapter is to investigate the nature of philosophical tasks and not to applaud or condemn those who have in recent times contributed to an understanding of them. Most of the assumptions in the revolution, and much of the work it has inspired, seem to the author to be very valuable.