In the spirit of pushing aside some fluff, let me describe a rational alternative to any "physical description" of the trajectory of an electron immediately before entering one or two holes in the diffraction experiment, which is otherwise desribed quantum mechanically. I claim the result here id drastically variant from a QM pont of view. Feynman used the phrase in Vol III "Lectures on {hysics" that of the QM model was not true then we would ahve to assume the electron picked the hole it would ultimately travel through before i arrives at he hole.
The electron be shrouded in a negative charged field is repulsed by the reflection of its own negative charge fileld as the electron approaches the surface containing the diffraction holes. Assuming as even distribution of forces over the exposed surface of the reflected negative field force, except the lowered force potential well marking the path from hole to approaching electron. The elecron will, fro momentun considerations direct itself into one of the possible holes used for the experiment. Here we do not have to split the charge field of the electron as it transform into a "wave" during transit. Mor must the electron "split as" abstracted by, not quantum theory, rather by quatum contrivance (excuse the venting_.
We know th weelectron is a two state particle which is assumed to mean the partile is in one or the other of the states before entering the diffraction conditions. This would simply mean the electron, prior to oarization in a satte of rapidly varying spibn states and only upon poalrization, when entering the hole, is the poalrized state determined such th ethe observed state is invariant to t further variation until acted upon by sufficient force. Like the
spin-1 Stern-Gerlach transition expeiments described by Feynman the nonlocal state, nonlocal by polarization "default", takes the "other hole" and performs the function it does while transitioning from a parallel direction alongside the electron. For one hole diffraction the nonlocal element i is dragged into a trailing position behing the electron, hence the different observed patterns on the scintillating screen.
This appears heretical, and I suppose it is, but it is a rational alternative, orders of magnitude less obtuse and contrived than the current standard model.