This volume concerns the nature, status, and acquisition of phonological knowledge, and its place in, or relation to, the theory of language and other capacities of mind. The contributions are written by well-known linguists and phonologists and address a wide range of interrelated issues: for example, whether phonology is 'different' from the rest of language; the implications of sign language; the nature-convention debate; and the data and methods of phonology. Of interest to researchers in phonology, linguistics, and psychology, the volume will also appeal to postgraduates and advanced undergraduates in linguistics.