The anti-zombie argument for physicalism. The conceivability argument — which assumes physicalism entails that zombies are impossible — purports to refute it by showing they are possible. As we saw, the simplest version of this argument goes: (1) zombies are conceivable; (2) whatever is conceivable is possible; (3) therefore zombies are possible. However, ‘anti-zombies’ — duplicates of ourselves made conscious by the purely physical facts (Frankish 2007) — also seem conceivable. So we have a par