I will agree that the placebo effect is a big hinderance to the occult/paranormal. "Mind over matter" works, undoubtedly.
However, when you've got a visible rash and can "feel" energy flowing from a crystal onto the rash and it goes away (this is what happened to me), you begin to wonder whether it was just your mind. Still, I can't prove anything beyond doubt, and there's still the placebo argument.
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