Yeah, I have a similar recollection of lectures at college 30 years ago, and what seemed to be a hugely complex system being reduced drastically in complexity b

Yeah, I have a similar recollection of lectures at college 30 years ago, and what seemed to be a hugely complex system being reduced drastically in complexity by the realisations contained within the maps. It was obviously a contrived situation that the lecturer had thought of, but there were many 'lightbulb' moments across the room in that hour.