 Let us say that the identity of a with b is temporary if a is sometimes, but not always, identical with b. Later we shall look at other types of puzzle cases that provide some motivation for countenancing temporary identity. Despite the existence of such cases the majority of philosophers are reluctant, principally because of the putative conflict with Leibniz's Law, to allow temporary identity. Instead, to deal with puzzles about identity through time a wide range of alternatives have been proposed. These include: maintaining that Cup is later constituted by Tcup (where constitution does not imply identity); denying that Tcup is earlier a proper part of Cup; maintaining that Cup and Tcup are never identical, but only share a later temporal part in common; holding that the identity between the earlier Tcup and later Cup is not literal, but only loose and popular.