Random walk

The definition of science by Karl Popper is based on the repeatibility of the observed phenomenon. However, to my knowledge, this only comprises the classical processes, those who can indeed repeat at each attempt, whereas quantum processes repeat only in a probabilistic manner. In Young's slit experiment, the electron going through the slit would impact the screen (located after the two slits) in a distribution of, indeed, not-so-random positions, but each electron almost never reaches the same position twice. This is namely why the Schrödinger equation is limited to provide a probability distribution, more than an iterative quantum process that woud form the observable macroscopic interference phenomenon.

But then, how can the definition of science of Karl Popper remain true at the quantum electrodynamical level?