The Boy Child had his first swimming lesson this afternoon and he loved it. It probably helps that there are just 4 children in total in the class.
The Brainy One has the opinion that if we people expect less of The Boy Child because of his condition, then he gives less. If, on the other hand, we people expect more, he gives more.
The Brainy One is correct (that's why he is The Brainy One).
And The Boy Child more than proved that theory today.