Detective-story writers give this thrill by exploiting the resources of the possible; however improbable the happenings in a detective story, they can and must be explained in terms that satisfy the reason. But in a ghost story, where natural laws are dispensed with, the whole point is that the happenings cannot be so explained. A ghost story that is capable of a rational explanation is as much an anomaly as a detective story that isn’t. The one is in revolt against a materialistic conception of the universe, whereas the other depends on it.
L.P. Hartley, The Third Ghost Book
ambiguity, ghost-story, materialism, supernatural