Full Idea
Whether to reject an anomaly has to be decided on the basis of the availability of a rival theory, and on the basis of the positive evidence for the theory in question.
Gist of Idea
Anomalies are judged against rival theories, and support for the current theory
Source
W.H. Newton-Smith (The Rationality of Science [1981], III.9)
Book Reference
Newton-Smith,W.H.: 'The Rationality of Science' [RKP 1981], p.75