As humans, our mere ability to think 'What if?' makes us believe that we are in control. But do we really change things, do we affect the reality. If we do , to what degree? It is said that if a butterfly makes an extra flap of its wings, the reality can change so much so that after a decade a nonexistent cyclone can result.Is it really true? Even if it is, does the butterfly really have a control enough to make that extra flap? Is it really free will or an illusion of free will? A very fascinating example is seen in first person games like Prince of Persia or God of wars and so on.The game makers try hard to give the gamers a feeling that they can do anything in that virtual world. The game programmers know very well though that they can program only a limited number of options. There cannot be more than a finite number of stimulus- response pairs that they would have programmed. Even then, while we play the game we feel that we are in complete control (at least that is the ai