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About: Underspecification     Goto   Sponge   NotDistinct   Permalink

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In theoretical linguistics, underspecification is a phenomenon in which certain features are omitted in underlying representations. Restricted underspecification theory holds that features should only be underspecified if their values are predictable. For example, in most dialects of English, all front vowels (/i, ɪ, e, ɛ, æ/) are unrounded. It is not necessary for these phonemes to include the distinctive feature [−round], because all [−back] vowels are [−round] vowels, so the roundness feature is not distinctive for front vowels. Radical underspecification theory, on the other hand, also allows for traditionally binary features to be specified for only one value, where it is assumed that every segment not specified for that value has the other value. For example, instead of the features