Early in “Sherlock Holmes” — and also again, later on — the famous sleuth demonstrates his ratiocinative powers in a way undreamed of by his creator, Arthur Conan Doyle. Observing a thug standing guard over a horrible crime in a dimly lighted church, Holmes calculates just how to surprise the man, disarm him and beat him senseless. The audience follows his thought process through slow-motion pre-enactment, observing how the laws of anatomy and physics will be used to snap bones, gouge organs and turn flesh into pulp. Then, having seen it diagramed once on screen, we see it all again, with more noise, in real time. Elementary!