Quantum mechanics further implies that there are entangled pairs of micro-particles such that it is causally necessary that one member of the pair is spin up if and only if the other member is spin down, and the properties of being spin up and being spin down are contraries.
Quantum mechanics(the scientific framework being discussed)
The science of how the tiniest things in the universe (atoms, electrons, photons) behave—which turns out to work very differently than everyday objects.
Spin up and spin down(the two possible states of the entangled particles)
Two opposite directions that a particle can spin, kind of like clockwise versus counterclockwise (though particles don't literally spin).
contraries(Key to the logical move in D1A1)
Properties that cannot both belong to the same subject simultaneously; here, being one and being many are contraries
Another possible defense of the possibility of a plurality of coexistent omnipotent agents appeals to quantum mechanics. Quantum entanglement seems to be a unique physical phenomenon whereby concurrent activities of diverse contingently existing substantial individuals are directly coordinated in virtue of a necessary linkage of some sort between those substantial individuals. By drawing an analogy with this phenomenon, one might argue that there could be coexistent omnipotent agents who necessarily avoid stalemates. Quantum mechanics implies that there exist pairs of entangled micro-particles...