At ENV Neurosurgeon Michael Egnor exposes how materialist metaphysics flounders on logical grounds in its theory of mind:
As an example, let us suppose that a certain pattern of neuronal activation in my cortex were shown to represent my thought about justice. Obviously that pattern is not my thought about justice itself — justice is a concept, not a bunch of neurons. And if that pattern of neuronal activation represented my thought about justice, it must map to my thought of justice, which presupposes my thought about justice and thus cannot explain it.
Succinctly, mental representation of abstract thought presupposes abstract thought, and cannot explain it. It is on abstract thought that materialism, as a theory of mind, flounders. Abstract thought, classically understood as intellect and will, are inherently immaterial. Any representation in the brain of abstract thought (while it may exist) necessarily presupposes abstract thought itself, which must, by its nature, be an immaterial power of the mind.