In American English, you can say that something is not too difficult by saying “it’s not rocket science.” We don’t have a good idiom for saying the opposite – that something is hard to understand, not bullet-pointable. Edward Tufte dislikes

In American English, you can say that something is not too difficult by saying “it’s not rocket science.” We don’t have a good idiom for saying the opposite – that something is hard to understand, not bullet-pointable. Edward Tufte dislikes