Logic, language, information, and computation : 15th International Workshop, WOLLIC 2008, Edinburgh, UK, July 1-4, 2008 : proceedings - Hodges, Wilfrid, 1941-; Queiroz, Ruy J. G. B. de (Lecture notes in computer science. Lecture notes in artificial intelligence. FoLLI publications on logic, language and information, 2008)