[gfodor]

Hell, we don’t even know if the brain is the causal creator of consciousness. It’s a contrarian view to think otherwise, but it can’t be proven false.

[Enginerrrd]

It can be proven false to any reasonable degree of certainty. With experiment, you'd increasingly be looking at an overwhelming probability that it is, or that the universe is actively conspiring against you to fool you on that notion. Which is, frankly, a bad argument.

If something is possible, but has measure zero in the probability space, it's really not worth considering.