^{page 172 note 1} Cf. Eddington's admirable description of the “circular” track of scientific reasoning in The Nature of the Physical World.

^{page 179 note 1} In speaking of the “point of view” of philosophy, I do not of course mean to refer exclusively to the professional philosopher as a different person from the historian and the scientist. I refer to the philosophical function of the mind, a function present both in the historian and in the scientist. That such a function is necessarily present in the minds of these persons is a corollary of the dialectical conception of philosophy stated in the text.