This paper argues that Chomsky's and Halle's restriction on the features [+high, +low] are too severe; that this restriction is inconsistent with the generative treatment of affricates, laterally-released stops, and prenasalized stops; and that the restriction is inconsistent with the notion that linguistic descriptions are abstract theories about…

This paper proposes a set of underlying vowels, alternate to those of Chomsky and Halle, to account for vowel alternations. This phonetic representational system, which is to a degree an extension of Chomsky's and Halle's basic framework, is demonstrated in the Laxing Rule and the Vowel Alternation Rule for all vowel variables. An appendix…