 what this example shows is that [disjoint] co-located material objects are not merely conceivable, but that a tremendously detailed conception of them has been formed: [disjoint] co-located objects play a role in the interpretation of certain physical theories. It might be that at the end of the day speculative physics will postulate co-located material objects. It seems to me that we should not disregard this possibility a priori. (2007a: 240)