Certain disciplines, generally called pseudosciences, falsely claim that they make actionable truthful statements about observable objective reality.
Examples are astrology, homeopathy, psychiatry.
How would you call a sincere practitioner (not a researcher/populariser) of such a discipline?
Not "charlatan" - the perpetrator is as deluded as the victim.
Not "pseudo-scientist" - just like a practicing surgeon would not be called a "scientist": this term seems to imply "original contribution" to the discipline as opposed to simply "plying the trade".
