In an otherwise excellent book by Shaun Nichols and Stephen Stich, Mindreading (Oxford: Clarendon Press, 2003), Nichols and Stich dismiss telepathy as a “supernatural” ability. Later, they mention “mystics” saying they have telepathic ability. The term “mystic” seems to be used in a pejorative sense, in which “mystical” means “anti-scientific.” These claims amount to ignorance that approaches being culpable. No one who has read the literature of parapsychology would hold that they claim that psi, including telepathy, is a “supernatural” ability. It is considered to be a natural power just as other powers of the organism (circulation, respiration, the five senses, etc.) are natural powers. Although some parapsychologists are Cartesian dualists (J. B. Rhine and Charles Tart approach Cartesian dualism, though with qualifications), even in those cases the soul is not considered to be a supernatural entity. There are theories of psi based on quantum physics (Dean Radin) and there are evolutionary theories of psi (James Carpenter) which do not even imply the existence of a spiritual realm.
To make the claim that psi is a supernatural ability, Nichols and Stitch require evidence. Instead of actually reading the parapsychological literature, they allow their personal biases to get in the way of objectivity. The only way a philosopher can make such broad and misinformed claims is failure to read the appropriate scholarly literature. Now if one has an a priori bias against psi to the point that one assumes that any putative scientific work on psi is “unscientific” (unless it is to “refute” psi), then one will fail to read the relevant literature. This an emotional, not a reasoned, reaction. I can respect a critic’s statements opposing the reality of psi if the person has done the appropriate reading and research. What I cannot respect are broad claims made from ignorance–and to dismiss an entire phenomena as non-science is both a claim from ignorance of the literature and is an ignorant claim. Philosophers surely can do better than this.