 Theorists such as Kaplan (1996) also suggests that talk of full belief is superfluous once the mechanisms of Bayesian decision theory are in place. After all, only partial beliefs and utilities play any role in the Bayesian framework of rational deliberation, whereas full belief need not be mentioned at all. Those committed to full beliefs have the burden of showing how rationality will be the poorer without recourse to full belief. Kaplan calls this the Bayesian Challenge. Stalnaker (1984) is much more sympathetic to a qualitative notion of belief, but acknowledges the force of the Bayesian challenge. 