If psychic phenomena exist, there is no reason to suppose that they cannot be studied scientifically, and that they are not simply another aspect of “nature.” Indeed, science is concerned with innumerable things which cannot be experienced with the senses, and which are not present to immediate experience—for example, the entire past, the process of gravity, the nature of time, and the weights of planets and stars. These invisible things are inferred from immediate experience by logic. They are hypotheses which seem to give a reasonable explanation of observed events.
