11. This goes against universalist ideas of a universal grammar , which has an innate grammar. 12. Generativist theories refer to Universal Grammar being innate where language experience activates innate knowledge. 13. This criticizes Universal Grammar on the basis that languages are dynamic and not fixed. 14. A true universal grammar , Chomsky argued, must satisfy two conditions. 15. One group of developmental psychologists who have embraced evolutionary perspectives are universal grammar ). 16. The universal features that would result from these constraints constitute " universal grammar ". 17. This unsourced knowledge suggests the existence of a universal grammar . 18. But this thicket of rules presented a major obstacle to the development of universal grammar . 19. Universal Grammar also provides a succinct explanation for much of the phenomenon of language transfer.20. Input is also the mechanism by which people learn languages according to the universal grammar model.
