These sorts of statements, and the whole article is filled with them, are futile. They are an attempt to provide a classical heuristic for Quantum Kinematics, i.e. Quantum Laws, which are beyond the reach of classical conception.
... and what is this? Physics night?
Of course, there's one other thing.
Maybe to get accurate answers, you just need the wave function for the entire universe, and work from that.
...and here's a pencil and two reams of paper. Good luck.
Cheers!