I’m an anti-materialist (although not a dualist). In this paper, I argue that modal considerations militate strongly against accepting materialism, even if canonical conceivability arguments against materialism (like the zombie argument) fail.
Although I agree with its conclusion, I am not persuaded by the knowledge argument against materialism. A materialist can say that when Mary learns what it’s like to see red, she changes only by coming to bear to a truth she already knew a knowledge-relation that she never bore to that truth before. Or, so I have argued.
In this paper, I argue that G.E. Moore’s open-question argument is vulnerable to the same objection I raise to the knowledge argument.
I give a brief, non-technical summary of my position on the knowledge argument here.