sentences:  Shape is argued to be one such property.So, if an object is capable of having a particular shape, and also changing its shape at another time, there must be some way for the same object to be, say, both round and square.Lewis argues that separate temporal parts having the incompatible properties best explains an object being able to change its shape in this way, because other accounts of three-dimensional time eliminate intrinsic properties by indexing them to times and making them relational instead of intrinsic.