“System 1 is automatic and deeply influential, but it is susceptible to illusion, and you depend on System 2 to help you manage yourself: by checking your impulses, planning ahead, identifying choices, thinking through their implications, and staying in charge of your actions. When a guy in a restaurant walks past a mother with an infant and the infant cries out “Dada!” that’s System 1. When the blushing mother says, “No, dear, that’s not Dada, that’s a man,” she is acting as a surrogate System 2, helping the infant refine her System 1.”