Apells inequality just says, imagine that you have two sets of observations that are separated a case o their space. They cannot signal back and forth to each other. And what bell noticed is that in quanta mechanics, because of entanglement, these things could be really highly correlated. Now, classically, they could be correlated also, but given things like the uncertainty principle and so forth, there's an upper limit on how correlated they could be if there was no wave function that spread across the distance. But look, as i said before, i think many worlds is right. So to me, this is not a profound result at all. Its a very simple consequence of the