 What has just been said about Oresme’s rejection of Aristotelian tenets on the nature of place is also true for his theory of time. Aristotle defines time as the number (that is, the measure) of motion with respect to before and after. Thus he deduces the existence of time from the existence of motion, which means that time is nothing independent of motion. In contrast to Aristotle, Oresme in his Physics Commentary defines time as the successive duration of things (duratio rerum successiva, also duratio successiva rerum or rerum duratio successiva), that is, the duration of the actual existence of things. By deducing his concept of time from the duration of things, which duration is prior to and independent of motion, Oresme clearly deviates from Aristotle’s point of view and the conventional manner in which this topic was discussed among medieval scholastics (Kirschner 2000a, 171–176; Zanin 2000, 257–259; Caroti 2001).