 Without the Bayesian analysis, one could say that the study of the history of science might have some (at least marginal) heuristic value for the scientist and philosopher of science; but with the Bayesian analysis, the data provided by the history of science constitute, in addition, an essential segment of the evidence relevant to the confirmation or disconfirmation of hypotheses. Philosophers of science and creative scientists ignore this fact at their peril. (Salmon 1970c [2005: 92])