  There is something appealing in this argument. As Priest and Routley put it, “in change… there is at each stage a moment when the changing item is both in a given state, because it has just reached that state, but also not in that state, because it is not stationary but moving through and beyond that state” (Priest, Routley and Norman, 1989, p. 7). Think of a body coming to rest at a given time, and compare it with the same body proceeding on to further motion. There must be something about the body at that instant which distinguishes the two scenarios, or there could be nothing at the time to count as continuing change. Cause cannot do it, for a body can continue in its state of motion without being impressed by an external force, as Newton taught us. Nor can mere velocity do it, since velocity is a relation to surrounding points. Indeed, there is no difference in velocity between a body momentarily at rest, and a body at rest for a period around the instant; yet one is changing and the other not.