I thought of this the same time i was thinking of my other post (a.k.a. If God does exist). we cannot tell where the electron is by testing it, but we can tell where it is not. If we shoot particle form point A, and it does not return to point A, we can tell that the electorn is not in the orbit that would have existed by a straight head on collision with the particle. Using this method and many super computers, in theory could not we limit the posible positions, speeds and directions of the electron, and given ehough time we could actualy leave only one posible path. This might even be applied to atoms above H, given though the time and amount of calculations would grow (expotetionaly so).