That a person who is a self-styled "witch" and "queen of satan" has a big incentive to learn latin and deny that she ever did. Just a few phrases would probably suffice. BTW how good is your latin that you can judge "perfect one" from "passable"?
> He or she might demonstrate “hidden knowledge” of all sorts of things — like how a stranger’s loved ones died, what secret sins she has committed, even where people are at a given moment. These are skills that cannot be explained except by special psychic or preternatural ability
Or, you know, cold reading.
> I have not witnessed a levitation myself, but half a dozen people I work with vow that they’ve seen it in the course of their exorcisms
Yeah, must be true then. Most likely explanation.
> One cannot force these creatures to undergo lab studies or submit to scientific manipulation; they will also hardly allow themselves to be easily recorded by video equipment, as skeptics sometimes demand.
Convenient, isn't it? On the other hand they don't care that you see them and write your book about them. They are only camera-shy.
> professor of clinical psychiatry
...