There’s a famous quote by Albert Einstein that “The whole of science is nothing more than a refinement of everyday thinking.” I’d heard it a number of times, but today I ran across a note by Carnegie Mellon psychologist David Klahr pointing out that Einstein’s aim was not to make science seem simple, but to call attention to the complexity of normal thinking. For Einstein continues:
It is for this reason that the critical thinking of the physicist cannot possibly be restricted to the examination of concepts of his own specific field. He cannot proceed without considering critically a much more difficult problem, the problem of analyzing the nature of everyday thinking.
The idea that “analyzing the nature of everyday thinking” is a “difficult problem” rather changes the meaning of the first line.