Chaos Theory...

You have a bag of marbles and you fling them about in any direction and they go flying everywhere. Where will the marbles land? Nobody knows. HOWEVER, we do know they won't land in Oklahoma. In fact we can predict fairly accurately the limits of where they will land given the strength of the flinger, etc. We might be able to say accurately that no marble will ever land more than 200 feet from the flinger. Chaos doesn't mean something is totally unpredictable. It means things are unpredictable within a certain set of parameters or tolerances.