[Skidoo]

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For example, if you know the position of a ball and the forces acting on it, you can predict its trajectory to infinity. Just imagine that ball on a subatomic scale. Now, take away the omnipotent being that the trajectory for every particle, although impossible for humans to figure out, would still theoretically be there.

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The so-called "elementary" thingies do not have proper trajectories in the defined sense of a macroscopic ball, for example. (Or they do in a way that is unobservable, if you buy that line of questionable science.) There simply isn't a trajectory that is "falsifiable" (if you don't mind) by means of observation, therefore there isn't one at all, really. The concept is just not applicable to the very small.