We believe we know ourselves, and that certainty is part of the problem. In his book Thinking, Fast and Slow, Daniel Kahneman, a Nobel Prize–winning professor emeritus of Princeton University, describes us as having two brains. One brain is slow, thoughtful, reflective, and data driven, and the other is fast, intuitive, and impulse driven. It’s the second brain we rely on most, which is why even when we think we’re being rational, we’re probably not.
