We've established that stuff either happens or it doesn't. Probability just gives you the chance of whether it will happen. Most people know that life doesn't follow pattern, and that even if the odd are 10 ^ 1000000 to one, the event can still occur, but the chance of it, provided by the probability, is quite low. Although the event could occur, it is not very likely to occur. Probability is not a 100% perfect fact, nor will it tell you how to find a free chocolate bar. It acts as an indication, not as a fact. If there was a race between a rock and a rocket, I think the rocket would win, but then again, the rocket could malfunction and be forced to be scratched. Therefore the rock wins. Anything is possible, just not probable.