So, I've removed and edited a number of posts. Guys... you're debating the "logic" of a set of circumstances that have never been fully and adequately described, even apocryphally, much less in-game (and notwithstanding pretty much every single installment of the series directly contradicting itself at some point or another.)
Nothing wrong with that, but you've got to keep within the forum rules. That means no flamebaiting, personal attacks, or any other form of insults. It's one thing to debate the topic or someone's points. Even for things to get a little heated. But debate the topic, not another member's credibility. That's not only poor debate skills, but against the forum's rules (and I really don't feel like figuring out how the new warning system works today.)
Just try and keep a sense of perspective on things? Maybe, just maybe the reason that the Great Ghoul Debate has never been categorically solved these past years is because there is no concise and "logical" answer beyond the simple "ghouls function in whatever manner the last people who wrote last game decided they should, and they probably didn't put near as much thought into it as we just did."