Barbara Lust, professor of linguistics and human development, stated: “Children as young as 3 years of age already possess a remarkable knowledge of language structure and syntax which is so complex and precise that it must challenge any known learning theory to account for its acquisition. ”
Lingvistika - ja inimarenguprofessor Barbara Lust tõdeb: „Juba kolmeaastastel lastel on tähelepanuväärsed teadmised keele struktuurist ja süntaksist, mis on sedavõrd keerukas ja täpne, et selle omandamist on mis tahes senituntud keeleteooria najal raske selgitada. ”