Published online by Cambridge University Press: 01 April 2022
In this paper a model is presented for the growth of knowledge in a dynamic scientific system. A system which is in some respects an idealization of a Lakatosian research program. The kinematics of the system is described in terms of two probabilistic variables, one of which is related to the evolution of its theoretical component and the other—to the growth of the empirical component. It is shown that when the empirical growth is faster than the theoretical growth the posterior probability of the theoretical component increases. Thus, empirical progressiveness of a research program, as explicated in this model, is accompanied by an increase in the degree of confirmation. In such a case the system grows in a Popperian-like spirit, while learning from experience in a Bayesian manner.
I wish to express my thanks to the University of Melbourne for its Fellowship support during the period of which the first version of this paper was written. The first version of this paper was read at the Annual Conference of the Australasian association for the History and Philosophy of Science, in August 1974. I would like to thank Harold Lindman, Manfred von Thun and the referees of Philosophy of Science for their valuable comments.