The essence of trial-and-error, rather than going directly the outcome you want. It's interesting that even Bret Victor's Inventing on Principle only accelerat

The essence of trial-and-error, rather than going directly the outcome you want. It's interesting that even Bret Victor's Inventing on Principle only accelerates trial-and-error, but doesn't eliminate it. http://www.youtube.com/watch?v=PUv66718DII&t=14m0s http://www.youtube.com/watch?v=PUv66718DII&t=14m0s For that, you need a declarative understanding, and an analytic relation from outcomes to initial conditions