  Suppose, for example, that based on her experience of (1) and (2), a  child were to adopt H1. How would she discover her error? There would seem to be two ways to do this. First, she could use H1in her own  speech, utter a sentence like (3b), and be corrected by her parents  or caregivers; second, she could hear a sentence like (3c) uttered by a competent speaker, and realize that that sentence is not generated  by her hypothesis, H1. But typically parents don't correct their  children's ill formed utterances (see §2.2.1(c) for more on this), and worse, according to Chomsky, sentences like (3c) — sentences  that are not generated by the incorrect rule H1 and hence would  falsify it— do not occur often enough in the pld to  guarantee that every native English speaker will be able to get it  right.