Comment by JumpCrisscross

> deflects the question one level down without explaining anything

There’s a lot of levels to SOC. Which do you think is “because it is?”

If you’re asking why spin values are restricted, it’s in the spin-statistics theorem [1]. If you’re asking why spin causes charge, that’s SOC. There are lifetimes of understanding contained within those layers.

[1] https://en.m.wikipedia.org/wiki/Spin–statistics_theorem