At the moment, I'm asking you what your reasons are for believing that the zombie world is coherently conceivable; I will defer passing judgment on them until I'm confident that I understand them, as I try to avoid judging things I don't understand.

So, no, I'm not making that assumption, though I'm not rejecting that assumption either.

Which of your other beliefs cohere better with a belief that the zombie world is coherently conceivable than with a belief that it isn't?