David Ragone and the Ragone plot

We were talking about engineering involving trade-offs and decisions, and I'm starting to talk about how you make decisions, which really gets into how you think. I talked to Dave Ragone this past week. Anybody working on batteries? Nobody. There's something called a Ragone plot, that David Ragone — Dave's about 85 now. He used to teach in the Department, he was a graduate of this department and he went on to do several things. His comment was: the scientist solves problems that can be solved, and the engineer solves problems that must be solved.