In addition to the structural features of discourses we have just described, our four discourses also have in common certain dynamic features.
Primary discourse has no agenda.
The closure is diagnosis and treatment for the technical, the sale or contract for the market, the life-choices and consent for the deliberative, and a basic relation of trust for the primary. The structure of the discourse event is determined by the answers to the questions in Table 2. Being able to answer these questions at key moments within the dialogue is important in the overall task of discourse management and effective physician-patient communication. The MDM works like a satellite-based celestial navigation system for the medical interview. Its structural and dynamic elements provide a system of coordinates that helps the guys in the middle of things on the ground find out where they are and where they're headed.