You brush your teeth to avoid cavities, you set your alarm clock to wake up on time, and so on. So your daily experience of living involves making one rational decision after another. You also believe—incorrectly—that you are rational when you make the big decisions about love and money and lifestyle. But that’s mostly a result of cognitive dissonance and confirmation bias. When we do irrational things—such as marry someone who is obviously a bad choice—we always have plenty of “reasons” to offer.
