>>729797
This is highly relative to how you consider what a soul is and how it works.
The soul is what grants us as William Lane Craig said "free will, intentionality, etc", and as he said our brain is what grants the soul to function, and if the brain is damaged, so is the soul its ability to think.
That said, the soul is defunct in people who only have a functioning brain stem. It cannot communicate with itself (the person), and it cannot communicate with any part of their bodies. So in that regard it's just as useless as if it weren't there.
It's like I stated earlier, everything human about them has been taken out. So it would be perfectly moral to put them out of this state, not just for resourceful purposes and medical help and money that can go to other people who are aware, need the help more, but also so that their soul can leave their restraints of flesh and blood and go up to heaven in hopefully, a perfect form.