Child language acquisition: Why universal grammar doesn’t help

In many different domains of language acquisition, there exists an apparent learnability problem to which innate knowledge of some aspect of universal grammar (UG) has been proposed as a solution. The present article reviews these proposals in the core domains of (i) identifying syntactic categories, (ii) acquiring basic morphosyntax, (iii) structure dependence, (iv) subjacency, and (v) the binding principles. We conclude that, in each of these domains, the innate UG-specified knowledge posited does not, in fact, simplify the task facing the learner.