 In the search for a solution to the mind-body problem one may be captivated by the thought that we know less about matter than we are commonly led to believe. All we do (or can) know are the dispositional properties of  matter.[11]  When combined with the insight that dispositions need categorical grounds, one discovers that one’s conception of matter is radically incomplete. In addition to all the dispositional properties that physics treats of, matter must have intrinsic categorical properties. Since the nature of these intrinsic properties is unknown, the following bold thought suggests itself. Perhaps these properties play a dual role: in addition to grounding to dispositional properties of matter, they also serve as the grounds of our conscious experience. These are the kinds of considerations that may lead one to Russellian monism, the view that 