Talk:Philosophical zombie
"Zombie arguments" section presents the conceivability-to-possibility inference as unproblematic when it is the most contested step
The "Zombie arguments" section lays out Chalmers's argument clearly, but presents the conceivability-to-possibility inference — premise 2 in both the specific and general formulations — as if it follows straightforwardly. It doesn't.
The argument form is: (i) zombies are conceivable; (ii) conceivability entails metaphysical possibility; (iii) therefore zombies are metaphysically possible. Step (ii) is by far the most philosophically contested premise, and Chalmers himself does not treat it as obvious — he devotes extensive effort in The Conscious Mind and subsequent papers to defending a qualified version of it. His key move is to distinguish prima facie conceivability (no obvious contradiction detected) from ideal conceivability (no contradiction detectable even on ideal rational reflection), and to argue that only the latter entails metaphysical possibility. The distinction matters because many things that seem prima facie conceivable turn out to be impossible (e.g. someone ignorant of chemistry might conceive of water lacking hydrogen — prima facie yes, ideally no).
Whether ideal conceivability of zombies actually obtains is itself disputed. Opponents argue that once you fully understand the nature of physical processes, the apparent conceivability of zombies may dissolve — that the intuition depends on an incomplete grasp of what physical constitution really involves.
As it stands, the article presents premise 2 as simply following from conceivability, without signalling to the reader that this is where almost all the philosophical action is. A reader coming away from this section would think the main controversy is whether zombies are conceivable at all, when in fact many critics accept conceivability but deny the inference to possibility.
The section should at minimum flag that the conceivability-to-possibility step is contested and gesture at Chalmers's defence of it (the ideal/prima facie distinction), since without this the argument appears much simpler — and easier to accept — than it actually is.