Information walls and norm-dependent abilities

The article studies the interplay between obligations, knowledge, and abilities. It introduces the notion of norm-dependent abilities–something that an agent knows how to achieve using a knowingly allowed action and assuming that the other agents also use only knowingly allowed actions. The main technical contribution is a sound and complete logical system that describes the interplay between the modalities representing knowledge, obligations, and norm-dependent abilities in the presence of information walls between the agents.