But these people still have an immortal soul, just as do the dreamers who have technicolor movies going on in their sleep.
Everyone has an immortal soul. And this soul exists, even if we don’t know about it, acknowledge it, or understand how to find it. By its very definition, the soul is immortal, cannot be destroyed, and exists eternally.
Where does pain go when you are asleep? It is still there when you wake up. The same is true for the soul. It goes nowhere, it is right there when you wake up and exists apart from your mental recognition of it.