... 1304-1310, 1989. [Schegloff and Sacks, 1973] Emanuel A. Schegloff and Harvey Sacks. Opening up closings. Semi- otica, 7:289-327, 1973. [Schegloff, 1992] Emanuel A. Schegloff. Repair af- ter ... of Computer Science, University of Waterloo, Waterloo, Ontario, 1990. Published by the department as Research Report CS-90-25. 286 Abductive Explanation of Dialogue Misunderstandings Susan ... repairs on the basis of the relatively few types of manifestations of mis- understanding, rather than the much broader (and hence more difficult to anticipate) range of sources. In this paper,...