Two (or more) people (the Interlocutors, also encodable as Interlocutor_1 and Interlocutor_2) talk to one another. No person is construed as only a speaker or only an addressee. Rather, it is understood that both (or all) participants do some speaking and some listening--the process is understood to be symmetrical or reciprocal. This frame differs from the Chatting frame in that the Interlocutors have a particular question that they are attempting to decide or understand. I would rather discuss politics with anyone but him. World leaders met to discuss global warming on the coldest day of the year.