Thinking for yourself is not so easy. When encountering an argument to a long held opinion or a wild idea, we use critical thinking to evaluate it, as we were taught to do in school. The problem is that critical thinking is critical. It focuses our thinking on the negative—what doesn’t work, what’s wrong with the idea—and encourages my-side thinking where we evaluate evidence in a way that favors our beliefs and entraps us into closed-mindedness. Thinking for yourself requires open-mindedness. Open-mindedness is being receptive and, when the issue is important, calls for actively searching for evidence against your beliefs.