Einstein had recently developed his theory of relativity and was on a speaking tour of the USA. After 3 weeks non-stop, he was tiring and expressed this to his driver.
“I could give your lecture, Sir. I’ve heard it so many times. Nobody knows what you look like. You rest, I’ll get up and give the talk.”
Dubious, but relieved, Einstein sat incognito in the audience. The chauffeur gave the speech word-for-word, to the delight of Dr Einstein and the audience, but then a famous professor stood and asked a long, complicated question.
Unfazed, the chauffeur said, “That is a very simple question, Sir, in fact, to show you how simple, I’m going to ask my chauffeur to answer it…”