Interrogative Belief Revision Based on Epistemic Strategies

I develop a dynamic logic for reasoning about interrogative belief revision, a new branch of belief revision theory that has been developed in a small number of papers, beginning with E. J. Olsson and D. Westlund's paper On the role of the research agenda in epistemic change [12]. In interrogative belief revision, epistemic states are taken to include a research agenda, consisting of questions the agent seeks to answer. I present a logic for revision of such epistemic states based on the notion of an epistemic strategy, a stable plan of action that determines changes in the agent's research agenda. This idea is a further development of an idea put forward in [6], that changes in the research agenda of an agent should be determined by stable, long term research interests. I provide complete axioms and a decidability result for the logic.