User blog comment:Twilight Despair 5/Hell Trial Theories/@comment-82.34.210.166-20130503014028

If you have a demon's bones, you can kill them. It shows the demon is simply a super nasty evil spirit. THe thing is a spirit is not dead after bones are burnt, Bobby proved that, his soul is simply released. So this makes me think that burning the bones of a demon cleanses them.

Demons used to be humans, so what if to cure them you have to restore them to their human bodies. We know angels can uses ashes to restore humans.

WIth bones, you can summon the spirit, so is it possible to use demon bones to summon a demon. SO when the gates are sealed, would this link be broken, remain, or would one/both ends of this link be destroyed, both the demon and their bones.