the awareness that is aware of experience is what I'm claiming to be primary, and a good analogy is the movie screen.
what appears on the screen changes, but the screen doesn't change.
the movie appearing on the screen is secondary, and would not appear without the screen.
is that more clear?
when what experiences is altered by the physical, it must itself be physical.
The movie screen in nonsense. I watch them on my laptop. Without the movie there would be no screen, what other purpose does it serve? Without the screen, we can watch any movie on anything. Your argument means nothing.
You said that we must not make assumptions. But the whole thread is based upon you assuming that you are something other than your brain. You aren't. You are your brain, that is all you are. When the brain stops working, your existence is over.