 A worry about Bayesian epistemology is that the two core Bayesian norms are so demanding that they can be followed only by highly idealized agents—being logically omniscient, with precise credences that always fit together perfectly. This is the problem of idealization, which was presented in the tutorial  section 1.9.  This section surveys three reply strategies for Bayesians, which might complement each other. As will become clear below, the work on this problem is quite interdisciplinary, with contributions from epistemologists as well as scientists and other philosophers.