Thought control, like birth control, is best undertaken as long as possible before the fact. Many grown-ups will obstinately persist, if only now and then, in composing small strings of sentences in their heads and achieving at least momentary logic. This probably cannot be prevented, but we have learned how to minimize the consequences by arranging that such grown-ups will be unable to pursue that logic very far. If they were at home in the technology of writing, there's no telling how much social disorder they would cause by thinking things out at length.Our schools have chosen to cut this danger off as close to the root as possible, thus taking measures to preclude not only the birth of thought but its conception. They give the pill to even the youngest children, but just to be on the safe side, they give it to everybody else, too, especially all would-be schoolteachers.
— Richard Mitchell
Psychological subjects