Mitchell_Porter (as far as I can tell) still believes dualism needs to be true if colour exists (or whatever his argument was, I'm embarrasing myself by trying to simplify it when I had a poor understanding of what he was trying to say)
The argument is that for dualism not to be true, we need a new ontology of fundamental quantum monads that no-one else quite gets. :-) My Chalmers-like conclusion that the standard computational theory of mind implies dualism, is an argument against the standard theory.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.