 Let me close this section with some clarifications. The two terms ‘objective Bayesianism’ and ‘impermissive Bayesianism’ are sometimes used interchangeably. But those two terms are used in the present entry to distinguish two different views, and neither implies the other. For example, many prominent objective Bayesians such as Carnap (1955), Jaynes (1968), and J. Williamson (2010) are not committed to impermissivism, even though some objective Bayesians tend to be sympathetic to impermissivism. For elaboration on the point just made, see  supplement E.