Well that right there is the problem, nobody can agree what a soul is or even if it exists. It's as pointless as trying to figure out how many angels can dance on the head of a pin. With there being no verifiable data about angels (or souls), no meaningful answers can be found.
Fine then, what is a soul? Don't use any vague mumbo jumbo, touchy feely words, just give me the facts! What, there are no facts in reference to souls? Well how about that. Insert the word "angel", "god(s)", "ipu", "ghosts", etc in there and we are again left with no facts other than that we appear not to have any real data that any of these exist except as constructs in our minds.