 Apart from the argument that it provides the best solution to diachronic identity puzzles four dimensionalism has been defended on a number of other grounds. One we have reviewed already; the argument that four dimensionalism gives the best solution to the problem of temporary intrinsics. Another, also offered by David Lewis, invokes the principle that facts in general supervene on facts about the instantiations of intrinsic properties and external relations. Call facts about the instantiation of intrinsic properties and external relations basic facts, and let R be the spatio-temporal region occupied by Plate throughout its career. According to Lewis there is a world W in which a sequence of shorter Plate-like objects occupy R, and all of the basic facts that obtain in our world obtain in W. Lewis' supervenience principle tells us that all facts supervene on basic facts. The same basic facts obtain in both our world and W. So whatever is true of the occupant of R in W is true of the occupant of R in our world. The occupant of R in W is a sequence of, appropriately interrelated Plate-like objects. Hence the occupant of R in our world, that is Plate, is likewise a sequence of interrelated Plate-like objects.