There were quite some interesting delusions by medieval folks in the day, not nearly as common anymore (glass delusion for instance), from what would best make sense to myself as intense stress. And while the mongols, or moors, or just losing your head was stressful enough, they didn't face the living dead as the Vales have done. I got curious about medieval mental health the other day.
Which would be...vastly over-simplified summary...you must be demon possessed! First, let's try to talk the demon out. Second, let's try to insult the demon out. Third, let's torture you so we make the body so uncomfortable for the demon it leaves!
