 Several other objections to Russellian monism have been raised in the recent literature, of which we will describe four. The first is related to the combination problem and applies only to Russellian panprotopsychism. It is argued that Russellian panprotopsychism faces the following sort of “revenge” problem. Russellian monism is motivated partly by its ability to provide plausible responses to influential anti-physicalist arguments, such as the conceivability and knowledge arguments  (section 3.1).  Those arguments usually begin by attacking allegedly implausible epistemic commitments of certain traditional physicalist views (such as analytic functionalism), such as the claim that structural truths alone a priori entail all phenomenal truths. However, some argue, parallel considerations undermine the Russellian panprotopsychist’s claim that protophenomenal truths and structural truths together a priori entail all phenomenal truths (Strawson 2006a,b; Goff 2015, 2017). Thus, for example, it is argued that while still in the black-and-white room Mary can come to know all the protophenomenal truths just as easily as she can come to know all the structural truths, and still not thereby be positioned to know what it is like to see red.