Wallace Matson was a professor of philosophy at UC Berkeley, and wrote the article “Zombies Begone! Against Chalmers’ Mind/Brain Dualism” to convince readers that Chalmers argument for dualism is foundationally flawed. Matson describes Chalmers to be a metaphysical revisionist, or someone who draws conclusions off a single alleged truth, which in this case that zombies are logically possible. Matson completes his destruction of Chalmers claim by first providing a history of logical possibility and possible worlds and proving that these conceptions are descendants of Medieval theological ideas and not axiomatic truths. He then considers logical possibility without theology or God, which results in only one truth: that anything cannot both be