In my comments on David Lightfoot in BBS (INFL,/Spec, and other fabulous beasts, 1989, 12:350–52) regarding language learnability, the symbol for verb was incorrectly printed as Y, rather than V. The error appeared at the end of the first paragraph in the second column on page 351. The clause should have read: “…the approach allows a child to learn rules of syntactic structure in terms of whatever category components he can so far identify (hence prior to the acquisition of the full repertoire of category notions) and it allows him to impose specific syntactic structures on sentence types whose syntax and semantics he has not yet learned (even a child who did not yet understand passive sentences would assimilate was given money to the already learned [V', VV'] surface configuration as soon as he had identified was as a V').”