Hi Ian, nice to see you here. Paul, have you studied neuroscience? When I was studying neuropsychology, I remember seeing a brain - a real brain, honestly - on the table in a lab.
Now, how did I know a brain was there? Because it was perceived in consciousenss.
How do we know brains exist? Through conscious experience.
In fact, there is no evidence that brains even exist except by means of conscious experience.
Note _ i get tired of having to say this and in fact, I've only just realized in the last few weeks the extent to which people conflate epistemology and ontology, but heck, here goes:
I'm NOT saying (as Donald Hoffman does) that only conscious experience exists. I'm simply saying, within the constraints of what modern scientists allow as legitimate knowledge, all the scientist EVER deals with are quantitative data points extracted from sensory observations, and sensory observations ONLY are known to us through conscious experience (at least, according to modern ideas of what knowledge is).
So your claim that we have "evidence" that consciousness arises from the brain is simply incorrect, scientifically speaking.