I honestly don't understand the need some people seem to have to reach for an extra-physical domain for the mind to exist in. It seems to me quite obvious that the human nervous system is necessary and sufficient to create subjective experience in humans.
We don't have such doubts about any other organ. For instance if someone's pancreas is damaged or needs to be removed, we accept readily that this person will no longer be able to produce insulin by themselves anymore. We don't search for some alternate metaphysical explanation for blood sugar regulation.
It's similarly easy to observe A/B tests vis a vis the brain's role in consciousness.
We don't have such doubts about any other organ. For instance if someone's pancreas is damaged or needs to be removed, we accept readily that this person will no longer be able to produce insulin by themselves anymore. We don't search for some alternate metaphysical explanation for blood sugar regulation.
It's similarly easy to observe A/B tests vis a vis the brain's role in consciousness.