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Published online by Cambridge University Press: 22 April 2026
Pre-Chomskyan linguistics recognized that the phonological systems of natural languages tend to form symmetrical patterns; this insight could be incorporated into generative phonology via a phonological base component, but is not adequately expressed by MS rules. A phonological base would also solve some difficulties in the theory of systematic phonetics. Current lack of interest in phonological patterning has resulted from the increased attention paid to morphophonemics; but the deep vs. surface distinction in phonology can be demonstrated on the basis of patterning even in languages lacking morpho-phonemic alternation. That distinction, it is argued, may be of only historical validity, whether or not alternations occur in the language.