Frank Jackson’s ‘Mary’s Room’ thought experiment claims to disprove physicalism. Patricia Churchland successfully defends physicalism. In this essay, I will argue that Jackson’s argument is flawed in four key ways: first, it relies on an impossible premise; second, it conflates experiential and learned knowledge; third, it fails to account for comprehensive knowledge of brain states; and lastly, Mary would acquire a new representation of a fact, not new knowledge.Â