"Note from Tim Ferriss: I asked Tim to share a fun piece of related background. Here it is. In early 2015, Elon reached out to schedule a call. He said he had read some Wait But Why posts and was wondering if I might be interested in writing about some of the industries he's involved in. I flew out to California to meet with him, tour the Tesla and SpaceX factories, and spend some time with the executives at both companies to learn the full story about what they were doing and why. Over the next six months, I wrote four very long posts about Tesla and SpaceX and the history of the industries surrounding them (during which I had regular conversations with Elon in order to really get to the bottom of the questions I had). In the first three posts, I tried to answer the question, "Why is Elon doing what he's doing?" In the fourth and final post of the series, I examined Elon himself and tried to answer the question, "Why is Elon able to do what he's doing?" That's what led me to explore all these ideas around reasoning from first principles (being a "chef" who comes up with a recipe) versus reasoning by analogy (being a "cook" who follows someone else's recipe)."