 Dretske (1996) maintains that there is nothing intrinsic to the brain that constitutes the difference between a red quality and a green one. Unless there are Russellian sense-data or at least immaterial properties, what distinguishes the two qualities must be relational, and the only obvious candidate is, representing red or green. But as before, if one has no objection to sense-data or immaterial properties, one will be unmoved. The neurophysiological type-identity theorist would protest here too, though the same rejoinders apply. A less commissive objection is that, contra Dretske, there are candidate relations besides that of representing: some wide functional relation, perhaps, or a typical-cause relation (where neither of these is itself taken to constitute representing).