My brother the genius as a boy. He really was an extraordinarily bright child, reading physics books when he was five. He went to school for the requisite 13 years, but they didn't teach him anything, he knew it all already.
His practical judgment is another story. He used an inheritance to buy a Wang computer. Remember them? Neither does anyone else, except perhaps Mr Wang. It cost $30,000 but was, according to him, a great investment. The company went out of business the following year.
In the 1970s, he believed strongly that we were going to run out of natural gas within the near future. He tried to get mother to convert to oil heat, but she pointblank refused. This led me to conclude that we would soon have a glut of natural gas.
He thinks everyone in the country should be on Medicare. Any takers for that theory?