Don't know if it's true, but, if it is, it makes for a good story!

As they were driving to yet another dinner, Albert Einstein mentioned to his chauffeur (who resembled him) that he was very tired of speechmaking. The chauffeur said that he had heard that speech so many times, he could give it himself...so Einstein let him do it! At the dinner, Einstein wore the chauffeur's cap and jacket and sat in the back of the room. The chauffeur gave a nice rendition of Einstein's speech. After the speech, a pompous professor asked a question about antimatter formation. Without missing a beat, the chauffeur said, "Sir, the answer to that is so simple that I will let my chauffeur answer it!"