The wittiest scene in Joel and Ethan Coen’s 2001 film The Man Who Wasn’t There is one in which a fast-talking defense attorney, Freddy Riedenschneider (marvelously played by Tony Shalhoub), invokes Heisenberg’s uncertainty principle as grounds for a not-guilty verdict in a murder case: We can’t know what really happened.… Because the more you look, the less you know. But the beauty of it is, we don't gotta know! We just gotta show that, goddamnit, they don't know. Reasonable doubt. Science. The atom. You explain it to me.