I don't get the impression that it's refuting the generative grammar theory as a whole, though, just the assertion by (many? most?) generative linguists that gr

I don't get the impression that it's refuting the generative grammar theory as a whole, though, just the assertion by (many? most?) generative linguists that grammars are governed by a set of innate constraints. Granted, I'm not familiar with how much of the basis for acceptance of generative grammar theory hangs on the concept of a universal grammar.