  Consider also Aristotle's classical version of the puzzle in regard to temporal boundaries: When a moving object comes to rest, is it in motion or is it at rest? (Physics VI, 3, 234a ff.) Of course, one could maintain that there is no motion or rest at an instant, but only during an interval, as Aristotle himself held (232a32–34). Yet the question remains: Does the transitional moment belong to the motion interval or to the rest interval? (On this version of the puzzle, see Medlin 1963, Hamblin 1969, Kretzmann 1976, and Sorabji 1983, ch. 26.)