Souls are interesting things. Not something you can prove you possess. Not something that can be measured, like a heartbeat. But something that can be destroyed by the absence of a heartbeat. No, you cannot prove you possess a soul. But once that soul dies, there doesn't need to be proof that you don't have one. Once that blackened pit opens inside you, the world can see it. The world cowers from it. Gage knew this because his soul was long gone...