Presumably, the theory of syntactic features developed earlier may remedy and, at the same time, eliminate a descriptive fact. Summarizing, then, we assume that any associated supporting element is to be regarded as the system of base rules exclusive of the lexicon. It may be, then, that the speaker-hearer's linguistic intuition cannot be arbitrary in an abstract underlying order. It appears that the earlier discussion of deviance raises serious doubts about a corpus of utterance tokens upon which conformity has been defined by the paired utterance test. For one thing, this selectionally introduced contextual feature is not quite equivalent to irrelevant intervening contexts in selectional rules.
see also: WikiPedia -- Chomskybot