Other arguments appeal to similar states of affairs featuring qualitatively indiscernible objects or regions. For example, Melia (2003: 162) presents a conceivability argument that requires us to conceive of a world that contains a single cylinder on a qualitatively homogeneous plane. Intuitively, there are many possible directions in which the cylinder could fall, but, since there is no qualitative variation between these possibilities, they can be distinguished only haecceitistically—i.e., with respect to the identity of which regions of the plane are occupied by the fallen cylinder.