This is a very important question for me which has bothered me greatly. I started talking about it in the Smolin cosmic natural selection thread. What I would like to know is, if the Universe started over a very large number of times (n) from t=0, the start of the big bang, In how many of these Universes would I be sat here typing this question? Possible answers are: 1/n, n, 0 ! What are the reasons and what is the certainty in the theory behind these reasons? I have always thought perhaps instinctively that the answer is 1/n because of the apparent randomness from quantum particle interactions right up to the scale of Galactic mergers. Even a hurricane cannot be predicted due to chaos and random behaviour. However I have been told this is wrong and I would like to understand fundermentally why I was wrong. I believe that this is an extremely important question and central to our understanding of our Universe.