I really don't have anything to write this time. Though I have many thoughts winding up in my head. But then, after a very long time I stumbled upon a good video in TED. This is regarding the complex system and solving the real problems through trial and error.
Though I could not help noticing Tim Harford, calling Hans Rosling the Mick Jagger of TED. By the way, Tim's book Undercover Economists is a great read for any one.
Bottom Line : "Its very difficult to make GOOD mistakes."