I am having trouble understanding how the idea of qualia and p-zombies is logically coherent. If philosophical zombies are conceivable, and behave exactly the same as human beings, then zombies would also claim that they possess conscious experience / qualia, even though they do not. Doesn't it then follow that our conviction that we have qualia cannot be DUE to us actually having qualia, since zombies would hold the same conviction? Thanks.
No, it doesn't follow. Compare: If an evil demon were thoroughly deceiving me right now about my surroundings, then my current perceptual experience would -- unbeknownst to me -- be unreliable. But the truth of that conditional doesn't imply that my current perceptual experience is -- unbeknownst to me -- unreliable. Likewise, if zombies are possible, and if they claim that they have conscious experience, then it follows that claiming to have conscious experience doesn't imply having conscious experience. But we knew that already.