Einstein was a determinist who suggests that 'for everything that happens there are conditions such that, given them, nothing else could happen'.
Heisenberg uncertainty principle, 'nothing is certain'.

Einstein refuted the idea by saying 'god doesn't plays dice with the Universe'

Proven through experiments: everytime we look at the electron, there is uncertainty with the position of it.

There is always the wild card and possibilities in whatever we do.

In some sense, we do have some free will, no one can pre-determine what we are going to do later.
There is always the wild card.

http://www.youtube.com/watch?v=lFLR5vNKiSw&feature=related