It's not so much the "genuinely omnipotent" bit that I have philosophical problems with as the idea of "ontologically basic mental entities". I don't think this is the place to go into it fully, but suffice it to say that nowadays I'm not sure if that even makes sense. If I don't think a situation makes sense, how can I assign it a probability?

Of course, I could weigh that against the probability that I'm mistaken, but I'm not sure whether we're meant to take that kind of thing into account.