Guyot [Public domain] There is a famous phrase we use all of the time; "smoke and mirrors". Do you know where it came from? It came from a German charlatan named Johann Georg Schröpfer. Mr. Schröpfer lived in the 1700s and gained notoriety by claiming to be able to raise the ghosts of the dead. Of course he could not. It turned out Mr Schröpfer used a simple projection mechanism, smoke and mirrors to give the illusion of ghosts appearing in front of his victims. Since then, we've...