Do we need to indicate the threshold? When do we start asking "What is it like to be a....." As I said in an interview once, maybe there is a colony of dolphins off the coast of Miami who have a rich, civilized mental life similar to our own (the true Miami Dolphins). We know we have the kinds of states that cause problems for materialism. Other creature haven't communicated with us in ways that really do show that they have the kind of mental life that we do, so far as I can tell. So humans could be unique in this way. But nothing happens to my argument if chimp studies show that the kinds of states that I think cause problems for naturalists also exist in animals. To me, that makes it worse for naturalists, not better.
What makes people think that a contemporary dualist is a Cartesian about animals? Ed always acts as if he can refute the AFR by citing chimp studies. But human uniqueness is a red herring in this discussion. If the mental properties we have are problematic naturalistically, then they are problematic naturalistically if we find them in other animals.