I don't actually understand what being a mentalist has to do with anything.
Parapsychological activities, such as telepathy and mind reading, and the belief that some mental phenomena cannot be explained by physical laws doesn't really seem relevant.
Unless JimF is meaning the alternative definition of the belief that the mind is the fundemental reality and objects of knowledge exist only as aspects of the subject's consciousness, in which case that's both pretty esoteric and would have to be stretched a ways.
Edit: typo.
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