Is materialism compatible with the reality of phenomenal consciousness? I argue no. If one wishes to remain a materialist, they will eventually have to give up the reality of phenomenal consciousness and join the eliminativists. The logical result of materialism is illusionism. So if one wishes to remain a realist about phenomenal consciousness, they must abandon materialism.

Some important definitions for our purposes today:

Phenomenal consciousness: Phenomenal consciousness is that which mental states have when it is like something to be/have those mental states. Roughly, experience.

Materialism: The view that phenomenal consciousness is either identical to or reducible to material states. Fundamental material reality is essentially non-experiential. If consciousness emerged, it was an instance of “weak emergence,” not “strong emergence”.

Illusionism: A form of materialism (more specifically, a form of eliminative materialism) that claims phenomenal consciousness is illusory. Illusionists don’t claim to have explained why we have phenomenal states; they purport to explain why we think we have phenomenal states, and argue that this is sufficient to explain phenomenal consciousness.

Nonreductive physicalism: The view that materialism is true, and that phenomenal consciousness is real and irreducible. Phenomenal consciousness is concretely real, but it’s not emergent, nor is it reducible to material states, nor is it identical to material states. (I think this view is incoherent.)

Emergentism: Emergentism is synonymous with “strong emergence,” as contrasted with “weak emergence”. Emergentism is the view that phenomenal states are not identical to, reducible to, or deducible from material states. I think this is a species of dualism, though not necessarily substance dualism. Dualists believe that phenomenal states are not identical to material states, and that they are not reducible to material states; and that one could know all the material states and still not be able to deduce the mental states.

Panpsychism: The view that experience is fundamental and ubiquitous in the natural world.

Mysterianism: The view that humans will never solve the hard problem of consciousness. This position can be arrived at by several mutually exclusive motivations. In today’s episode, I consider all philosophers who take this position “mysterians”, even though they don’t all dub themselves mysterians.

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