That's why i say "if we agree that the brain is described by physics".
If you argue that a brain cannot be described by computation and there is something supernatural like soul, that's a fine theory, and the only way to disprove it, is to create working general ai.
I am not really sure about the value of this philosophical positions, since the ones i have seen, simply suggest to ignore logic for a little bit, to obtain the result they feel is correct.
The suggestion by Penrose that consciousness is connected to quantum state, and so cannot be copied, or computed on any classical turing machine fitting in the universe, is an interesting way to circumvent strange predictions of functionality, but is not very plausible.
And Jaron Lanier from your other comment explicitly suggests to not use approaches like that, because it would weaken vitality argument, when proven wrong.
If you argue that a brain cannot be described by computation and there is something supernatural like soul, that's a fine theory, and the only way to disprove it, is to create working general ai.