... Uniform Treatment of Pragmatic Inferences in Simple and Complex Utterances and Sequences of Utterances Daniel Marcu and Graeme Hirst Department of Computer Science University of Toronto Toronto, ... recognition stage for each of these inferences, all of them can be de- feated by context, by knowledge, beliefs, or plans of the agents that constitute part of the context, or by other ... approach that offers a unified explanation for the cancellability of pragmatic infe- rences in general, and of no approach that handles cancellations that occur in sequences of utterances....