Contra Metaphysical Idealism

[Angrboda]

I'd like to get your thoughts on split-brain subjects.

Split-brain experiments, aphasias, dementia, etc. make it clear that there is a relationship between the brain and the nature of our experiences. To deny that would be an announcement of solipsism-- i.e. that the brain is just a dreamed-up illusion.

This is not my position. My position is that all our experiences, including those about the physical universe and the relationships embodied in it, are reducible only to ideas, i.e. that "down there" all you'll ever find is that the pot is still at the end of the rainbow: atoms made of protons, electrons and neutrons, these made of quarks, and these made of what? In the end, nothing but an idea of a thing, rather than something that is locatable in time and space and taking volume.

I'd still like to get your thoughts on split brain subjects, nonetheless.

That's a rather strong claim, not only that experiences haven't been reduced to brain matters, but that they will never be reduced to brain matters. Do you have an argument or evidence for your position?