The great enemy of perception, and thus of accurate predictions, is judgment. People often learn just enough about something to judge it as belonging in this or that category. They observe bizarre conduct and say, “This guy is just crazy.” Judgments are the automatic pigeon-holing of a person or situation simply because some characteristic is familiar to the observer (so whatever that characteristic meant before it must mean again now). Familiarity is comfortable, but such judgments drop the curtain, effectively preventing the observer from seeing the rest of the play.
