In philosophy of mind, Cartesian materialism is the idea that at some place (or places) in the brain, there is some set of information that directly corresponds to our conscious experience. Contrary to its name, Cartesian materialism is not a view that was held by or formulated by René Descartes, who subscribed rather to a form of substance dualism.We can suppose, both theorists have exactly the same theory of what happens in your brain; they agree about just where and when in the brain the mistaken content enters the causal pathways; they just disagree about whether that location is to be deemed pre-experiential or post-experiential. They even agree about how it ought to 'feel' to subjects: Subjects should be unable to tell the difference between misbegotten experiences and immediately misremembered experiences.The now standard response to Dennett’s project is that he has picked a fight with a straw man. Cartesian materialism, it is alleged, is an impossibly naive account of phenomenal consciousness held by no one currently working in cognitive science or the philosophy of mind. Consequently, whatever the effectiveness of Dennett’s demolition job, it is fundamentally misdirected (see, e.g., Block, 1993, 1995; Shoemaker, 1993; and Tye, 1993). In philosophy of mind, Cartesian materialism is the idea that at some place (or places) in the brain, there is some set of information that directly corresponds to our conscious experience. Contrary to its name, Cartesian materialism is not a view that was held by or formulated by René Descartes, who subscribed rather to a form of substance dualism. In its simplest version, Cartesian materialism might predict, for example, that there is a specific place in the brain which would be a coherent representation of everything we are consciously experiencing in a given moment: what we're seeing, what we're hearing, what we're smelling, and indeed, everything of which we are consciously aware. In essence, Cartesian materialism claims that, somewhere in our brain, there is a Cartesian theater where a hypothetical observer could somehow 'find' the content of conscious experience moment by moment. In contrast, anything occurring outside of this 'privileged neural media' is nonconscious. According to Marx and Engels (1845), French materialism developed from the mechanism of Descartes and the empiricism of Locke, Hobbes, Bacon and ultimately Duns Scotus who asked 'whether matter could not think?' Natural science, in their view, owes to the former its great success as a 'Cartesian materialism', bereft of the metaphysics of Cartesian dualism by philosophers and physicians such as Regius, Cabanis, and La Mettrie, who maintained the viability of Descartes' biological automata without recourse to immaterial cognition. However, philosopher Daniel Dennett uses the term to emphasize what he considers the pervasive Cartesian notion of a centralized repository of conscious experience in the brain. Dennett says that 'Cartesian materialism is the view that there is a crucial finish line or boundary somewhere in the brain, marking a place where the order of arrival equals the order of 'presentation' in experience because what happens there is what you are conscious of.' Other modern philosophers have generally used less specific definitions. For example, O'Brien and Opie define it as the idea that consciousness is 'realized in the physical materials of the brain', and W. Teed Rockwell defines Cartesian materialism in the following way: 'The basic dogma of Cartesian materialism is that only neural activity in the cranium is functionally essential for the emergence of mind.' However, although Rockwell's concept of Cartesian materialism is less specific in a sense, it is a detailed reply to Dennett's version, not an undeveloped predecessor. The main theme of Rockwell's book Neither Brain nor Ghost is that the arguments Dennett uses to refute his version of Cartesian Materialism actually support the view that the mind is an emergent property of the entire Brain/Body/World Nexus. For Rockwell, claiming the entire brain is identical to the mind has no better justification than claiming that part of the brain is identical to the mind. Dennett's version of the term is the most popular.