David Perkins,12 a Harvard psychologist who has devoted his career to improving reasoning, found the same thing. He says that thinking generally uses the “makessense” stopping rule. We take a position, look for evidence that supports it, and if we find some evidence—enough so that our position “makes sense”—we stop thinking. But at least in a low-pressure situation such as this, if someone else brings up reasons and evidence on the other side, people can be induced to change their minds; they just don’t make an effort to do such thinking for themselves.
