Now, it has been shown in the article on space that the ease with which space under goes scientific manipulation is due to the fact that the space of science is a construction from ri the spatial data of our experience which is largely determined by considerations of scien tific convenience. As we have just seen, the fact that experiences are arranged in time does not prevent the stuff from which time is made from being of the nature of experience-data. There is consequently no obstacle to a treat ment of this material in a manner entirely p-arallel to the physical treatment of space, or to the combination of time-data with space data and other empirical data into a single universe which is not separable into purely spatial and purely temporal dimensions, as in the case of the theory of relativity. Of course, the time of science, like the space of science, i3 a construction which is largely arbitrary and so in a sense a fiction, but there is reason to believe that the time of the unscientific man. of Bergson himself, owes its homogeneity, its unique, definite direction of flow, its continuity, to more or less unconscious acts of construc tion which differ in degree, not in nature, from those of the scientist. There is no reason to
believe that our time data, talcen raw, un ordered, unschematized, indicate of themselves a single series into which all events fit in a definite order; indeed, there is good reason to believe that the laws which we unquestioningly associate with time are outlined only in the vaguest way in our defmite temporal experi ences.
Before leaving the subject of the phi losophy of time, a word or two must be said concerning the Zenonian ,paradoxes. These have to do with the flying arrow, which cannot remain where it is, nor be where it is not, and with Archiles, who, though the swiftest of men, cannot catch up with the slow tortoise except by occupying an infinity of positions, and with other similar matters. In fact, though these paradoxes seem to deal with space and time, they deal with the properties of infinite assemblages (see