“<i>Now, I might be quite wrong, maybe they do know all these things. But I don’t think I’m wrong, see, I have the advantage of having found out how hard it is to get to really know something, how careful you have to be about checking the experiments, how easy it is to make mistakes and fool yourself. I know what it means to know something. And therefore, I can’t… I see how they get their information, and I</i> can’t believe <i>that they know it ­– they haven’t done the work necessary, they haven’t done the</i> checks <i>necessary, they haven’t done the</i> care <i>necessary. I have a great suspicion that they don’t know.</i>”<p>— Richard Feynman, <i>The Pleasure of Finding Things Out</i> (1981)