The mere possibility of zombies is enough to refute physicalism about the mind. The anti-physicalist, however, cannot simply start with the possibility of zombies as a premise without begging the question against physicalism. How can we assess whether zombies are possible on impartial grounds?
Despite initial plausibility, physicalism about consciousness is a controversial view. It has come under heavy attack from two unlikely opponents in an academic debate, namely ghosts and zombies.