Read the Black Swan yet? Great book (has nothing to do with the movie)
Some things are simply beyond our understanding and the things we will never understand infinitely outnumber all the things we will ever know squared. We don't even know what we might or might not be able to understand.
It looks like it's a great book indeed.
So still we don't know if our world is deterministic and causal and therefore we don't know whether fate or free will (under the actual definition) exists.
The two things are not correlated. Judging from the rapidity of your answer, I take it you didn't bother to read the scientific papers I gave you.
Cashmore explains why it is so, and why free will is an illusion. Read it, you might learn something.
We might be a bag of chemicals, but chemical reactions obey Heisenberg uncertainy principle. I mean, you cannot predict the behaviour of a bacteria in the far future just like you cannot predict the behaviour of anything in the far future because we don't know with infinite precision the position and velocity of anything.
In the end we don't know if free will exists because we just don't know the inner works of the tiniest particles.