The 'Intrinsic Nature' Argument for Panpsychism

Strawson's (2006) case in favour of panpsychism is at heart an updated version of a venerable form of argument I'll call the 'intrinsic nature' argument. It is an extremely interesting argument which deploys all sorts of high calibre metaphysical weaponry (despite the 'down home' appeals to common sense which Strawson frequently makes). The argument is also subtle and intricate. So let's spend some time trying to articulate its general form.