 The AGM model and most related models of belief change assume highly idealized reasoners who have unlimited cognitive capacities. Harman (1986) developed a set of rationality principles for resource-bounded epistemic agents. Wassermann (1999), Alechina (2006), Doyle (2013) and others have developed models of belief change for agents with limited cognitive capacities. The use of finite belief bases (section 5) can be seen as a way to avoid the operations on infinite belief sets that are standard in AGM. Operations on infinite sets can require infinite resources, which makes such operations impossible for agents with finite resources.