Edited in collaboration with FoLLI, the Association of Logic, Language and Information, this book constitutes the refereed proceedings of the 8th International Tbilisi Symposium on Logic, Language, and Computation, TbiLLC 2009, held in Bakuriani, Georgia, in September 2009. The 20 revised full papers included in the book were carefully reviewed and selected from numerous presentations given at the symposium. The focus of the papers is on the following topics: natural language syntax, semantics, and pragmatics; constructive, modal and algebraic logic; linguistic typology and semantic universals; logics for artificial intelligence; information retrieval, query answer systems; logic, games, and formal pragmatics; language evolution and learnability; computational social choice; historical linguistics, history of logic.

The papers of the volume mirror the ongoing debate on approaches towards two related topics: conjunction and ellipsis. The major issues are the syntactic relationship between the conjuncts, the syntactic category of the conjunction words, the size of the conjuncts, the syntactic and semantic status of the null elements, and semantic and information structural restrictions. A wide range of facts from various languages are explored in relation to phrasal coordination, Gapping, Pseudogapping, VP-ellipsis, and Sluicing.