The epistemic theory of miracles is the name given by the philosopher William Vallicella to the theory of miraculous events given by Augustine of Hippo and Baruch Spinoza. According to the theory, there are no events contrary to nature — that is no "transgressions", in Hume's sense, of the laws of nature. An event is a miracle only in the sense that it does not agree with our understanding of nature, or fit our picture of nature, or that it thwarts our expectations as to how the world should behave. According to a perfect scientific understanding there would be no miracles at all.
The name of the theory is derived from the Ancient Greek word ἐπιστήμη, episteme, meaning "well-founded knowledge".