Of course, if you're an adult of average intelligence, then 50% of parents will be dumber than you. Parents who are dumber than you are would not be rare at all

Of course, if you're an adult of average intelligence, then 50% of parents will be dumber than you. Parents who are dumber than you are would not be rare at all. But I'm not comparing adults with other adults. I'm comparing adults with children. I would be surprised to find a child that was smarter than their parents; it happens, but it's rare.