I compeltely disagree with that. Actually, if you interpret reality as i do, it is all consisted of reactions that obbey pre-existing laws (gravity for example. That is the school of determinism - what will happen here in two years is already determined, since it's only a reaction of what happens today, which is a reaction of what happened two years ago, and so on. These reactions follows strict rules that will converge in what will happen then. An example of this is predicting tomorow's weather by knowing the way it is today.
Predicting the future is, though impossible for a human or machine, since there are too many things to determien and process (the slightest difference in the speed of an electron would render the results invalid).
Free will is apparent, because our actions and thoughts themselves are only reactions. You might take it like "I have free will, I like apples" - but everything that happened on the universe so far converged on you liking apples. So, yeah, free will doesn't exist (although it may not seem like so).
I made a thread about determinism a while ago:
science proves fate?
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Time travellign is only possible to the future - because to the past would make an endless cycle (more like a logical fallacy). Actually because, to relatively advance to the future, you must go to a place of less gravity (space), and to relatively "go back", you'd have to go somewhere where gravity is stronger than light (a black hole). And everyone knows it's impossible to get out of a black hole (not even light can heh).
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