In my lab, which studies the cognitive development of children, we have found<br />that even 1½-year-olds can understand that someone else might want something different from what they want.<br />They understand that someone else might like broccoli, even though they themselves prefer crackers, and they will help that person get what he wants.<br />They understand and care about how other people feel and think, and recognize that other people can feel and think differently from them.<br />Children as young as 2½ say that hurting another child is always wrong, even if an authority figure were to say otherwise.<br />But Mr. Trump doesn’t just lie; he seems not even to care whether his statements are true.
