In all honesty, I think the logical thing is they are sent back to the soul line await another chance at life.....like getting on a rollercoaster and right before it starts it breaks down. You just get to be first in line if they can get it working again. *shrugs* my thoughts anyways.
*religious crackpot theory warning*
Besides i don't believe the soul enters them until they have some kind of consciousness. Since i believe your soul is your conscious mind. So as soon as a being is able to think for itself and know it exists, the soul has taken root. This also solves the question if AI robots will have souls. Yes they do and they are also considered GOD's creatures just like how you are considered your grandparents grandchild. Except on a different plain of existence instead of genetics. But hey, like i said, just my crackpot theories here.
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