“But there are two problems. First, the brain is imperfect. We mistake things we see and hear. We forget things or misinterpret events quite easily. Second, once we create meaning for ourselves, our brains are designed to hold on to that meaning. We are biased toward the meaning our mind has made, and we don’t want to let go of it. Even if we see evidence that contradicts the meaning we created, we often ignore it and keep on believing anyway.”