Semantics Foundational Issues

This book provides a systematic study of three foundational issues in the semantics of natural language that have been relatively neglected in the past few decades. focuses on the formal characterization of intensions, the nature of an adequate type system for natural language semantics, and the formal power of the semantic representation language proposes a theory that offers a promising framework for developing a computational semantic system sufficiently expressive to capture the properties of natural language meaning while remaining computationally tractable written by two leading researchers and of interest to students and researchers in formal semantics, computational linguistics, logic, artificial intelligence, and the philosophy of language

This collection of papers stems originally from a conference on Property Theory, Type Theory and Semantics held in Amherst on March 13-16 1986. The conference brought together logicians, philosophers, com puter scientists and linguists who had been working on these issues (of ten in isolation from one another). Our intent was to boost debate and exchange of ideas on these fundamental issues at a time of rapid change in semantics and cognitive science. The papers published in this work have evolved substantially since their original presentation at the conference. Given their scope, we thought it convenient to divide the work into two volumes. The first deals primarily with logical and philosophical foundations, the second with more empirical semantic issues. While there is a common set of issues tying the two volumes together, they are both self-contained and can be read independently of one another. Two of the papers in the present collection (van Benthem in volume 1 and Chierchia in volume II) were not actually read at the conference. They are nevertheless included here for their direct relevance to the topics of the volumes. Regrettably, some of the papers that were presented (Feferman, Klein, and Plotkin) could not be included in the present work due to timing problems. We nevertheless thank the authors for their contribu tion in terms of ideas and participation in the debate.

The book focuses on a conceptual flaw in contemporary artificial intelligence and cognitive science. Many people have discovered diverse manifestations and facets of this flaw, but the central conceptual impasse is at best only partially perceived. Its consequences, nevertheless, visit themselves as distortions and failures of multiple research projects - and make impossible the ultimate aspirations of the fields. The impasse concerns a presupposition concerning the nature of representation - that all representation has the nature of encodings: encodingism. Encodings certainly exist, but encodingism is at root logically incoherent; any programmatic research predicted on it is doomed too distortion and ultimate failure. The impasse and its consequences - and steps away from that impasse - are explored in a large number of projects and approaches. These include SOAR, CYC, PDP, situated cognition, subsumption architecture robotics, and the frame problems - a general survey of the current research in AI and Cognitive Science emerges. Interactivism, an alternative model of representation, is proposed and examined.

Representational systems such as language, mind and perhaps even the brain exhibit a structure that is often assumed to be compositional. That is, the semantic value of a complex representation is determined by the semantic value of their parts and the way they are put together. Dating back to the late 19th century, the principle of compositionality has regained wide attention recently. Since the principle has been dealt with very differently across disciplines, the aim of the two volumes is to bring together the diverging approaches. They assemble a collection of original papers that cover the topic of compositionality from virtually all perspectives of interest in the contemporary debate. The well-chosen international list of authors includes psychologists, neuroscientists, computer scientists, linguists, and philosophers.