Parapsychology is the study of certain anomalous phenomena and ostensible causal connections neither recognized nor clearly rejected by traditional science. Parapsychology’s principal areas of investigation are extrasensory perception (ESP), psychokinesis (PK), and cases suggesting the survival of mental functioning following bodily death. The study of ESP has traditionally focused on two sorts of ostensible phenomena, telepathy (the apparent anomalous influence of one person’s mental states on those of another, commonly identified with apparent communication between two minds by extrasensory means) and clairvoyance (the apparent anomalous influence of a physical state of...