[vidarh]

The extraordinary claim would be the claim that something that violates known physics is happening in the brain, and that claim is a necessary prerequisite for it to be impossible to replicate the processes of the brain. As such the burden is squarely on anyone suggesting they can't be replicated to show at the very minimum a plausible indication that there's unknown physics going on.

Just one measurement that doesn't fit would be enough to shift the burden. Absent that, any suggestion we can't is no more than a religious belief.