 So then, nothing moves during any instant, but time is entirely composed of instants, so nothing ever moves. A first response is to point out that determining the velocity of the arrow means dividing the distance traveled in some time by the length of that time. But—assuming from now on that instants have zero duration—this formula makes no sense in the case of an instant: the arrow travels 0m in the 0s the instant lasts, but 0/0 m/s is not any number at all. Thus it is fallacious to conclude from the fact that the arrow doesn’t travel any distance in an instant that it is at rest; whether it is in motion at an instant or not depends on whether it travels any distance in a finite interval that includes the instant in question.