This book reviews the history of the interface between morpho-syntax and phonology roughly since World War II. Structuralist and generative interface thinking is presented chronologically, but also theory by theory from the point of view of a historically interested observer who however in the last third of the book distills lessons in order to assess present-day interface theories, and to establish a catalogue of properties that a correct interface theory should or must not have. The book also introduces modularity, the rationalist theory of the (human) cognitive system that underlies the...

Following up on the Guide to Morphosyntax-Phonology Interface Theories (2011), written from a theory-neutral point of view, this book lays out the author's approach to the representational side of the interface. The book is thus about how information is transmitted to phonology when an object is inserted into phonological representations (as opposed to the derivational means, i.e. phase theory today). The idea of Direct Interface is that diacritics such as hash-marks in SPE or prosodic constituency since the early 80s, which mediate between morpho-syntax and phonology, are illegal...