4 is not a correct summary because consciousness being extra physical doesn’t imply epiphenominalism; the argument is specifically against physicalism, so it leaves other forms of dualism and panpsychism on the table.
5 and onwards is not correct, Chalmers does not believe that. Consciousness being nonphysical does not imply a lack of knowledge of it, even if our experience of consciousness is not causally efficacious (though again I note that the p zombie argument doesn’t show that consciousness is not causally efficacious, Chalmers just happens to believe that for other reasons).
No part of the zombie argument really makes the claim that people or philosophers are conscious or not, so your analogous reasoning along 5-7 is not a reflection of the argument.
4 is not a correct summary because consciousness being extra physical doesn’t imply epiphenominalism; the argument is specifically against physicalism, so it leaves other forms of dualism and panpsychism on the table.
5 and onwards is not correct, Chalmers does not believe that. Consciousness being nonphysical does not imply a lack of knowledge of it, even if our experience of consciousness is not causally efficacious (though again I note that the p zombie argument doesn’t show that consciousness is not causally efficacious, Chalmers just happens to believe that for other reasons).
No part of the zombie argument really makes the claim that people or philosophers are conscious or not, so your analogous reasoning along 5-7 is not a reflection of the argument.