This paper explores the truism that people think about what they say. It proposes that, to satisfy their own goals, people often plan their speech acts to affect their listeners' beliefs, goals, and emotional states. Such language use can be modelled by viewing speech acts as operators in a planning system, thus allowing both physical and speech acts to be integrated into plans. Methodological issues of how speech acts should be defined in a planbased theory are illustrated by defining operators (...) for requesting and informing. Plans containing those operators are presented and comparisons are drawn with Searle's formulation. The operators are shown to be inadequate since they cannot be composed to form questions (requests to inform) and multiparty requests (requests to request). By refining the operator definitions and by identifying some of the side effects of requesting, compositional adequacy is achieved.The solution leads to a metatheoretical principle for modelling speech acts as planning operators. (shrink)

This paper embeds the core part of Discourse Representation Theory in the classical theory of types plus a few simple axioms that allow the theory to express key facts about variables and assignments on the object level of the logic. It is shown how the embedding can be used to combine core analyses of natural language phenomena in Discourse Representation Theory with analyses that can be obtained in Montague Semantics.

This book presents one of the first attempts at developing a precise, grammatically rooted, theory of conversation motivated by data from real conversations. The theory has descriptive reach from the micro-conversational - e.g. self-repair at the word level - to macro-level phenomena such as multi-party conversation and the characterization of distinct conversational genres. It draws on extensive corpus studies of the British National Corpus, on evidence from language acquisition, and on computer simulations of language evolution. The theory provides accounts of (...) the opening, middle game, and closing stages of conversation. it also offers a new perspective on traditional semantic concerns such as quanitifcation and anaphora. The Interactive Stance challenges orthodox views of grammar by aruging that, unless we wish to excluse from analysis a large body of frequently occurrring words and constructions, the right way to construe grammar is as a system that characterizes types of talk in interaction. (shrink)

For me the adventure began just 50 years ago, here at MIT in 1961. The Chomskian revolution had just begun, and Noam Chomsky and Morris Halle had just opened up a PhD program in Linguistics, and I came in the first class. I want to start by thanking Chomsky and Halle for building that program, and I thank MIT and the Research Laboratory of Electronics for supporting it. I’m indebted to Chomsky for revolutionizing the field of linguistics and making it (...) into a field whose excitement has never waned. Chomsky redefined linguistics as the study of human linguistic competence, making linguistics one of the early pillars of cognitive science. (shrink)