Maybe he means "The theory of relativity in words of four letters or less [than the theory of relativity]" -- i.e., it is an _incomplete_ explanation -- which s

Maybe he means "The theory of relativity in words of four letters or less [than the theory of relativity]" -- i.e., it is an _incomplete_ explanation -- which some of the people on this page seem to agree with. Seriously, I thought this was extremely clever, and the short, clipped style reminds me of Hemingway or Mamet.