But don't bother pointing it out to the interviewee. That will only cause them to withdraw. And giving someone a reality check would upset the natural order and meaning that they've created in their lives. And if you want to get to know the real person, you must make them comfortable in their sometimes irrational skin. So if you want to know how your customers will behave in the future, don't ask for more of their opinions. Just take a look at their behavior.