Thank you, but is it valid to ask why it's just the way it is?
I mean, obviously there is no point inventing possibilities for the sake of it; and I know that we have only ever observed positive or negative charges.
My question is really: if you take on the theoretical possibility of charges...
Consider an Argand diagram that shows the number line (positive and negative) and the imaginary plane of other possibilities.
As in, we have numbers that are positive and negative, and through complex numbers all of the polarities in between.
I am using this as an analogy, because we have...