Rules in dialogue

In this paper a model is presented that describes the cooperative be haviour of two participants in a dialogue. A dialogue is considered as a set of moves (or speech acts) in a game. Each move has a certain function and propositional content and changes the cognitive state of the participants. Two types of rules are considered: generative rules that determine the type of speech act that will be permutual formed in the next turn and update rules that determine the change in the cognitive state. Goal of the dialogue is to exchange information in a collaborative manner so that, if the information is available, in the final state both participants believe the answer to an initial question. The resulting structure of the information exchange may be complex, because knowledge to find the answer may be distributed among the participants