They both leave people with an impression that they’re not saying everything they’re thinking, which is true. Both have a tendency to be sarcastic when they think someone else is in the wrong. The sarcasm comes from the sense of knowing how things are connected, and feeling like others surely must know it, too; it also comes from a strong sense of alienation and being different. Even in childhood, people like this know they see things in a different, minority way, and they often find that other people think they’re wrong. They feel—in fact they know with stubborn certainty—that they aren’t
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