From the latest (9/5/11) New Yorker, from an article by Ian Frazier about Theo Jansen.
"At the end of my working day, I am almost always depressed. Mine is not a straight path like an engineer's, it's not A to B. I make a very curly road just by the restrictions of goals and materials. A real engineer would probably solve the problem differently ...But the solutions of engineers are often much alike, because human brains are much alike. Everything we think can in principle be thought of by someone else. The real ideas, as evolution shows, come about by chance. Reality is very creative."