Weight of Evidence, Corroboration, Explanatory Power, Information and the Utility of Experiments

S(H: E fG) = h{P(H. E. G), P(E. G), P(H)}-h{P(G. H), P(G), P(H)} and the proof of Theorem 6 is invalidated. A valid proof can, however, be constructed without undue difficulty and the details will be supplied on request. Professor Aczel and I believe that, by using methods of Aczel (1966), the references to differentiability in my paper can be replaced by references to continuity, provided that the statement of Theorem 16 and of (vi) on p. 330 are changed to