Tom picked up the bottle of shampoo and squirted some in his hand.

He burns part of it in the fire. With part of it, he eats meat. He roasts a roast, and is satisfied. Yes, he warms himself, and says, Aha! I am warm. I have seen the fire.

He burneth part thereof in the fire with part thereof he eateth flesh he roasteth roast, and is satisfied yea, he warmeth himself, and saith, Aha, I am warm, I have seen the fire

Now for those who don't believe this argument, we have trees and grass on our planet without the brain, but the clinching evidence is this animal here the humble sea squirt.