> If you rehash it in smaller words, just by information density alone, aren't you guaranteed to be losing some detail? Yes, but knowing which information you

> If you rehash it in smaller words, just by information density alone, aren't you guaranteed to be losing some detail? Yes, but knowing which information you can lose is why it is said that you don't understand it until you can explain it. Explaining it in simple terms forces you to over-simplify, and then you have to pick which information is important and which isn't...and doing that requires a deep understanding of the subject (and your audience).