To loosely paraphase Feynman - the fact the author can explain it so clearly to those not deep in the field demonstrates a real understanding and depth. (Feynm

To loosely paraphase Feynman - the fact the author can explain it so clearly to those not deep in the field demonstrates a real understanding and depth. (Feynman said something like, if you can't explain it to a layman you don't really understand it.)