Canadian raising, opacity, and rephonemicization

Canadian Raising-the phonetic changes in vowel quality and quantity in the diphthongs /ai/ and/ au/ before voiceless consonants-has been of considerable importance to phonological theories ever since Joos (1975). The opaque interaction of Canadian Raising and flapping in words such as writer consitutes one of the main arguments for rule ordering in phonology (Chomsky and Halle 1968; Chambers 1975). Recently, Mielke, Armstrong, and Hume (2003) have challenged Joos's phonemic splitting analysis and have argued that Canadian Raising, rather than being a productive phonological process, is a static lexicalized generalization implemented as a choice between allomorphic variants. A rebuttal to this allomorphic analysis is offered based on evidence that, for some speakers, Canadian Raising productively applies in novel morphological contexts, in language games, and in the phrasal phonology, none of which are amenable to an allomorphic analysis.