By, ‘non-physicalist’, I mean the rejection of the physicalist view (of the mind). Obviously, this includes a lot of views in the philosophy of mind. The most well-known rival of physicalism, when it comes to the mind, is probably dualism about the mind. Dualism itself includes positions like substance dualism and property dualism. Substance dualism is a position you see in many religions; it’s a view that posits an immaterial/incorporeal self.
I don’t think substance dualism is a view that should be taken seriously in light of what we now know from contemporary science, and I think it is a view that looks the closest to what vitalism was.
We know that the mind is what the brain does. Once you have all the physical parts in place and running, there’s nothing left to explain. Intuitions be damned! There were a lot of things in history that seemed counter-intuitive, but that did not (forever) stop science from making progress. And frankly, I don’t place much weight on intuition. Also, ironically, there’s nothing intuitive about an immaterial soul having causal interactions with a physical body.
If you read a lot of contemporary philosophy of consciousness, you will quickly get the impression that these philosophers are saying, “It doesn’t make sense to me that sentience is entirely physical. It seems strange. Therefore, sentience isn’t physical.” I’m not even kidding. These philosophers ran with the slogan, “No question is a stupid question” and made it their life slogan.
The takeaway is that any view of the mind denies something like “The mind is the brain” or “The mind is what the brain does” is literally pseudoscience at this point. It’s out of date and not even testable. I don’t mean to rule out artificial consciousness. All I am saying is that consciousness is realized in complex physical systems that are organized in the correct way. I don’t find consciousness anymore mysterious than baseball games; I don’t find consciousness anymore mysterious than digestion.
Sure, you can even imagine a philosophical zombie: an entity that behaves and acts like it is conscious but isn’t really conscious (though if it walks and quacks like a duck…). However, you can imagine a lot of things, and imagining something isn’t the same thing as conceiving of something. Not to mention, conceivability doesn’t entail logical possibility (any first year philosophy student can tell you that).
Since the mind is physical, the implication is that death is final. Once you die, that’s it. No second chances.