 Explanations of how coinciding objects can have different properties vary with different versions of the standard account. Some claim that coinciding objects share all their parts (and are parts of one another). Others claim that, for example, the arm of the statue is not part of the lump of clay, although there may be an arm-shaped lump of clay which constitutes the statue-arm and is part of the bigger lump of clay. But a couple of themes recur in defences of the standard account: first, there is an attempt to shift the burden of proof. Why expect all the properties of a composite object to be determined by the identity, properties and interrelations of its present parts? Second, there is the point that, although the standard account entails that objects made of the same parts may differ, there is no arbitrariness here. Not every object made of suitably-arranged particles of clay is a lump of clay, for some are statues, but whenever there are suitably-arranged particles of clay, there is a lump of clay.