What is to be said in favour of this proposal? The first thing to say is that it is not obvious that we have an alternative proposal, at least at present. We learn about matter through its causal impact on our senses or on our measuring devices; as Eddington (1928: 58–60; quoted in Strawson 2006a) put it “Our knowledge of the nature of the objects treated in physics consists solely of readings of pointers [on instrument dials] and other indicators”. It’s hard to see how this indirect method of investigating matter could yield insight into its intrinsic nature. Derk Pereboom (2011) has suggested that future thinkers may through imagination theorise their way to a positive hypothesis concerning the intrinsic nature of matter, and such a proposal may turn out to have empirical support, or theoretical support of some other kind. However, at least as they are currently conceived of, the physical sciences have no use for speculation concerning matter’s intrinsic nature. It is arguable that our choice is between the panpsychist proposal and the view that the intrinsic nature of matter is “we know not what”.