At the end of the first and second principles, I was reminded of thoughts by two other writers... who were mentioned in the immediately next passage (Kay and Covey, respectively). It seems like a clear nod to the audience.<p>But I'll mention my first thought anyway: abstract ideas that are difficult to reason about can be made easier to work with by finding a better representation. Hopefully one exists. Alan Kay compared multiplication with Roman numerals (in Roman times, only geniuses could do it) with today's positional numerals (in modern times, children can do it). <i>We haven't got any smarter</i>, he said, <i>we've just changed our representation system. Inventing better representation systems is something important that we do as programmers.</i> This was Kay's explanation of "point of view is worth 80 IQ points" that Nielsen mentioned.<p>Perhaps, in the context of teaching, this itself was an example of the communication technique where you set up a trigger for the audience - a striking image to evoke their own memory, or a puzzle to provoke their own reasoning - so that they take ownership of the message, and it makes more connections to their own network of pre-existing ideas. The "nod", or implicit punchline, is confirming for those who caught the reference; is completing for those who half caught it (filling a gap is another way for increasing memorableness); and just plain informing for those new to the topic.
Or am I reading too much into this physicist's writing, and he has quantumed me out?