What does Tomasello refute in his theory of language acquisition?

Tomasello's theory of language acquisition challenges the notion of universal grammar, which is a key concept proposed by Noam Chomsky that suggests all human languages share an inherent structure wired into the brain. In contrast, Tomasello emphasizes that language learning is rooted in social interactions and cultural contexts rather than relying on an innate grammatical framework. He argues that children acquire language through their experiences and the communicative practices they engage in with others. Thus, by refuting universal grammar, Tomasello shifts the focus toward the significant role that social interaction plays in the development of linguistic ability, highlighting that children learn language in ways that are influenced by their environment and the specific languages they hear.