What does it mean that language is hierarchically structured?
It means that phonemes make up morphemes, morphemes make up words, words make up phrases and clauses, and phrases and clauses make up sentences.
It proves that the idea of a mental lexicon is an outdated concept, believed by ancient philosophers but no longer taken seriously today.
It means that all languages are created from alphabets that have a predetermined order.
It suggests that humans (but not animals) store all words in their mental lexicons at the same level for easy retrieval.
