The question is if there are any cases recorded of people starting from a rational world view and they are headed for a psychosis, what is the initial reaction out of them. Will they catch it, or maybe somebody else will catch it, before something horrible occurs.
Edit: Reading a few articles on "schizophrenic vulnerability" and it does appear to be argued around the edges almost exactly what I am arguing. The idea is that the "belief in demons" is a trigger which causes such mental breakdowns.
