The article discusses the importance of understanding grammar dependency and non-grammatical sequences in language acquisition. It emphasizes that the nature of grammar lies in the idiomatic expressions used by people, and that grammar dependency, the internalization of grammar in the brain, is often overlooked. This lack of understanding can lead to biases in learning strategies and goals for language learners. The non-grammatical arrangement of words in first language acquisition should be given more attention in language theories and practices.