Authors:

It doesn't take a rocket scientist to figure out that if you tell kids they're stupid--directly or indirectly--sooner or later they start to believe it.

The Freedom Writers, Erin Gruwell (2007). “The Freedom Writers Diary (Movie Tie-in Edition): How a Teacher and 150 Teens Used Writing to Change Themselves and the World Around Them”, p.39, Broadway Books
It doesn't take a rocket scientist to figure out that if you tell kids they're stupid--directly or indirectly--sooner or later they start to believe it.