The technical working papers that comprise the two volumes of this document are related to the problem of creating a valid process model of human communication in dialogue. In Volume 2, the first paper concerns study methodology, and raises such issues as the choice between system-building and process-building, and the advantages of studying cases over studying general language use. The second is a design paper on the MATCH process of the Dialogue Model System. The MATCH program examines a node in the workspace (WS) and one in the long term memory (LTM) and decides whether the WS node can be regarded as exactly the same concept as the LTM node or as a specific instance of the general concept represented by the LTM node. The paper explores methods for making MATCH efficient and selective. The third paper concerns the structure of persuasion dialogues, in particular how justification of actions appears in argumentation. The two argument forms examined are (1) "means-end" argumentation and (2) an argument from present speech-acts to statements about the present or future behavior of the author of those speech-acts. (Author/WBC)