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Message: <blockquote data-quote="Fiona" data-source="post: 2530839" data-attributes="member: 257778"><p>Not at the quantum level.  Some processes such as radioactive decay occur completely and utterly at random with no cause whatsoever.  That makes them impossible to predict.  Since they then go on to influence larger scale events, which then influence other events, and so on, it becomes impossible to predict what will happen.</p></blockquote><p></p>