Self-deception makes us better at deception. For example, there is value in my being able to deceive you into thinking I am stronger than I really am. You’re less likely to pick a fight with me, I’m more likely to win a dominance struggle without fighting, and so on. I am better able to bluff you if I actually believe I am stronger than I really am. So we deceive ourselves in order to be better able to deceive others.
Filed under: delusions.