Furthermore, assuming the falsity of dualism, we know that the intrinsic nature of at least some matter is consciousness-involving: namely the matter of brains (or whole organisms if we think that organisms are the bearers of consciousness). This is perhaps our only real clue as to the intrinsic nature of matter in general; as regards the intrinsic nature of stuff outside of brains (or of the parts of brains) we can only speculate. Goff (2016, 2017: ch. 7, 2019a: ch. 4) has argued that from this epistemic starting point there is a clear “simplicity argument” in favour of panpsychism: in the absence of any reason to suppose otherwise, the most simple, elegant, parsimonious hypothesis is that the matter outside of brains is continuous with the matter of brains in also having a consciousness-involving nature. Eddington (1928: 259–60; quoted in Strawson 2003) remarked that it was rather “silly”, given that we know nothing from physics of the intrinsic nature of matter, to suppose that its nature is incongruent with mentality and then to wonder where mentality comes from. These panpsychists try to put the onus on their opponents to come up with a non-panpsychist proposal as to the intrinsic nature of matter, and to give reasons to prefer it to the prima facie much simpler and more parsimonious panpsychist proposal. Responses to Goff’s simplicity argument for panpsychism are offered by Taylor (2019) and Dainton (forthcoming).