4 December 2018 markie: "spatial extension as well" and "abstract probability function" lies about QM.
There is no "spatial extension" at all in QM.
There is no "abstract probability function" in QM. The wave function is a mapping of every possible state of a system to complex numbers.
From Ethan's article, my bold:
The secret is that, at a fundamental level, these atomic nuclei don’t behave as particles alone, but rather as waves, too. Each proton is a quantum particle, containing a probability function that describes its location, enabling the two wavefunctions of interacting particles to overlap ever so slightly, even when the repulsive electric force would otherwise keep them entirely apart.
Two wave functions 'overlapping' involve spatial extent. In the abstract. You're just trying to be difficult now.