Sir Edmund Whittaker, in his Space and Spirit (p. 121), explains in terms of the recent mathematics and physics, the end of the Renaissance idea of continuous, uniform space that came in with the notion of visual quantification: At this point we escape from the order of the Newtonian cosmos. . . . In the argument as usually presented the language used is appropriate to the case when each effect has only one cause, and each cause has only one effect, so that all chains of causation are simple linear sequences. If we now take into account the fact that an effect may be produced by the joint action of several distinct causes, and also that a cause may give rise to more than one effect, the chains of causation may be branched, and also may have junctions with one another; but since the rule still holds, that the cause always