False assumption.
There are more possible combinations of pair-bondings among the staff on my floor than there are employees in the entire building.
The claim is not that there are more neurons in the brain (or atoms in the brain) than there are atoms in the universe, the claim is that there are more connections. A to B could be one connection and A to C another, and B to C yet a third.
It’s still highly doubtworthy but your logic isn’t compelling.
chrisk:
Agreed.