Re Knuth: "A complex system that works is invariably found to have evolved from a simple system that worked." - Gall's Law - Tesla claimed that he could envisa

Re Knuth: "A complex system that works is invariably found to have evolved from a simple system that worked." - Gall's Law - Tesla claimed that he could envisage an entire complex machine (and run it, so he could watch which parts wear out), without experimenting or prototyping or designing anything - as a contrast to Edison. - Henri Poincaré claimed that complex new insights came to him fully formed (after immersing himself in their details), from his unconscious. Re Simon Peyton Jones: Functional programming is the future of imperative programming and always will be.