Abstract
This paper aims to develop the description of move systems in Systemic Functional Linguistics based on dynamism in knowledge exchanges, that is, the possible move options made available at different points in an exchange concerned with the negotiation of information. Using conversational interactions in Khorchin Mongolian as examples, the paper argues that at different points in a knowledge exchange, both the speaker and the addressee’s knowledge of the information are at stake. The speaker may be positioned either as knowing or as not knowing the information; at the same time the addressee may be positioned either as knowing or as not knowing the information. It is also possible for the interlocutors not to be positioned either way. The move systems developed make it possible to discuss the options preselected and activated at different points in a knowledge exchange and the way interlocutors are dynamically positioned as an exchange unfolds.