I'm not sure I ever got a straight answer about whether the reason we don't fall through things is actually Pauli exclusion or electrostatic repulsion, but I'm

I'm not sure I ever got a straight answer about whether the reason we don't fall through things is actually Pauli exclusion or electrostatic repulsion, but I'm pretty sure even Pauli exclusion won't apply to different kinds of particles trying to occupy the same space. And electrostatic repulsion definitely won't work to keep electrons and positrons apart. I think the positrons and electrons in the outer shells would make contact instantly, and everything would unravel from there.