Not the same people? I"m a regular joe, and I am interested in Feynman diagrams. I suggest that articles should start with the simple and progress to the complex. Opening with a mind-bender sentence like this one shows a lack of consideration for anyone with less education than a PhD. A few sentences is all we're asking for. Im sure Mr Feynman would agree that any science concept can be explained in everyday terms, and Wikipedia is certainly an appropriate place for such explanations. Perhaps someone familliar with his works could look up what he himself said about his diagrams? Surely that would be an appropriate opening?