is that every entity and rule, and every complexity and restriction of domains of a rule, states a departure from randomness in the language being described. Since what we have to describe is the restriction on combinations in the language, the description should not add restrictions of its own."

The hypothesis of Universal Grammar (UG) amounts to the contrary proposal that (some) metalinguistic resources for language are in fact a priori, prior to and external to language, as part of the genetic