Earlier quoted context omitted.
I am willing to agree that it is still more art than science in its current state, but I personally think we are slowly moving towards a replicable mind after all -- a terrifying prospect, because it would truly prove 'free will' is an illusion. It currently seems impossible due to sheer number of factors with overlapping effects. I don't think it is impossible though.
I suspect it is improbable, because an honest, undeniable belief that you lack free will would drive someone stark raving mad. It would represent a fundamental phase change in the way an individual interacts with the world, which I would wager would be antithetical to effective transmission of the belief. Far more dangerous would be the 90% mark, where understanding of psychological determinism advances to a point wh…
I don't think I'm raving mad, but perhaps because I don't act on my beliefs, I don't fit your conditions?
However, I do believe the justice system would be better run with this in mind.