…about this? The first man who seemed to have noticed the fact that you can't pick up any charts from the inside of an object was Franklin. And he wrote a note to a friend in which he said, this seems to me to be a very singular fact. You ask me…

…experimentally, by, I am embarrassed to say, I don't remember whether it was, I think it's Faraday, but it might have been Franklin. Anyway, it's somebody whose name begins with F. And I know at least this much that it isn't Feynman anyway. At any…