Conditionalization, Cogency, and Cognitive Value

There is a well-known solution to this problem, due originally to F. P. Ramsey and revived by, amongst others, I. J. Good.1 Bayesianism as a theory of rational belief is usually yoked to a theory of rational action. Indeed, standard justifications for the two theoretical tenets often already embody the presumption that it is rational to maximize expected value. So let's add to the above core the following tenet of decision theory: