형식문법에 결여된 설명의 다양한 가능성

What generative theory and OT have in common is that the empirical observations about properties of synchronic states in the languages of the world are directly inserted (sometimes in a simplified form) into the innate apparatus of Universal Grammar, without any attempt being made to formulate them in such a way as to explain their existence. To say that a constraint is universal and innate is to isolate it from possible explanation on the basis of factors outside of language, and, indeed, to preclude the need for further explanation. Even those versions of OT that appeal to phonetic or functional explanations for constraints fail to provide the crucial diachronic link between the functional factor and the existing synchronic state.

 

cit. 

Bybee 2006, chapter 8: Language change and universals,  in Marial and Gil eds. Linguistic Universals, Cambridge University Press.