Imagine for a moment that David Chalmers himself is a zombie, completely lacking internal experience, and then consider the types of things he says in his book The Conscious Mind when explaining the concept of a zombie: Because my zombie twin lacks experiences, he is in a very different epistemic situation from me, and his judgments lack the corresponding justification. . . . I know I am conscious, and the knowledge is based solely on my immediate experience. . . . From the first-person point of view, my zombie twin and I are very different: I have experiences, and he does not.
