I’m sure he knows what he’s talking about, even if I still, after all three of these videos don’t. It’s as if he’s afraid of coming out of the depths he dwells in this subject, so as not to fool us (or himself?) into thinking it’s actually any simplified analogy he might come up with. I for one just can’t reach what he was getting at, and I think it’s a first for me in Numberphile videos.