A piano-shaped bunch of quarks and electrons is a piano. The causal powers of the piano are exactly the same as a piano-shaped bunch of quarks and electrons. Mentioning the quarks and electrons is doing no work, because we can talk of pianos without knowing anything about quarks and electrons.
That’s what I meant: if two things are identical, they have identical causal powers. The Singer/Strawson argument seems to be that nothing exists or causes anything unless it is strongly emergent.
Less like I oppose ever using words “exist” and “causes” for non-fundamental things, and more like doing it is what makes it vulnerable to conceivability argument in the first place: the only casual power that brain has and rock hasn’t comes from different configuration of quarks in space, but quarks are in the same places in zombie world.
That’s what I meant: if two things are identical, they have identical causal powers. The Singer/Strawson argument seems to be that nothing exists or causes anything unless it is strongly emergent.
Less like I oppose ever using words “exist” and “causes” for non-fundamental things, and more like doing it is what makes it vulnerable to conceivability argument in the first place: the only casual power that brain has and rock hasn’t comes from different configuration of quarks in space, but quarks are in the same places in zombie world.