Well Dennett, for one, does indeed claim we can dismiss zombies this easily.That is the whole problem for the anti-zombist. If the possibility of zombies could just be dismissed with a wave of the hand, they'd pose no problems for supervenience materialism.
You haven't explained how you do this. I don't think you are really imagining it.Easily. We imagine an abscence of any internal awareness. As much as the materialist would like to claim that this is impossible to imagine, it is hard to see how he is going to convince a neutral of this. Imagining zombies is all too easy.
How do you do that? What exactly are you imagining?We are imagining that it lacks the awareness that we ourselves are currently experiencing. We imagine it has no consciousness.
I can attempt to imagine that someone or something is conscious, that there is, in the phrase, something it is like to be that thing. I can sucessfully imagine consciousness in the case of other people, I struggle in the case of most animals and I fail completely if I try it with inanimate objects. I can't imagine what it would be like to be them. There are things that I assume are not conscious because I cannot imagine them as being conscious. But that doesn't mean I can directly imagine a lack of consciousness in them. All I do is try to imagine consciousness and fail.
The problem is, I don't fail when I try to imagine a p-zombie as being conscious. I succeed just in the same way I succeed when I imagine other normal humans as conscious because they are indistinguishable.