What makes it an "absolute certainty" for you? FWIW human brain does indeed consume a lot of energy, accounting for over 20% of our body metabolism. We don't k

What makes it an "absolute certainty" for you? FWIW human brain does indeed consume a lot of energy, accounting for over 20% of our body metabolism. We don't know how to attribute specific watts consumed to specific thoughts because we don't understand the functioning of the brain enough, but there's no obvious reason why it shouldn't be possible.