I think a lot of people look at the world and think that the people that designed it were executing a well laid out plan, or before they executed anything they had to have deep understanding of theory. What Jobs was saying though I think, was that the world around us is full of inventions that didn't come about that way, but came about through tinkering and being curious. Anyone can tinker and be curious, that doesn't take any credentials. As for the author's comments on today's leading entrepreneurs, everyone's biased to think they'd make the right decision in hindsight. Good decisions today don't look at all the same as after they've been validated.
Seriously, the course on the essence of linear algebra did more for me than my entire college linear algebra course. It's only a pity I discovered the videos at the end of my mechanical engineering degree and not sooner.
The host Stephen Dubner sites a piece in psychology today that argues physical activity is strongly connected with cognitive function. https://www.psychologytoday.com/us/blog/the-athletes-way/201...