Extra-Sensory Perception: Part III. Explanation and Discussion: Chapter 10. Physical Conditions in the Functioning of E.S.P.

If one is reasonably sure that he is dealing with a process of reality that is not explainable by the commoner hypotheses of chance, fraud or error, he naturally must seek the explanation in some newer direction. [paragraph continues] It may be that the route to explanation will lead in a round-about way to old and known principles, as is the more common type of scientific advance, i.e., explaining the new in terms of the old. On the other hand, it may be that quite new principles of reality…