The Origins of Language

[@SaraBaira17-ns1jo]

Thank you very much for you explanation

[@univ-english]

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[@hanant6592]

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[@hunteraljberi3590]

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[@andyalim]

Thank you ❤️

[@MatthewMcVeagh]

That's not what 'duality' is used to mean in linguistics in the context of identifying essential qualities of human language. It sounds like someone's come across the word in this context but not learnt the truth about it and instead just made something up. It refers to the two levels of language structure, the phonological and the morphological. I.e. that bodies of language output can be broken into discrete, identifiable units of form like morphemes and words, but that these can in turn be broken down into phonemes (or graphemes etc.). The phonological units are not particular to any morphological elements, i.e. the same ones can be re-used and re-combined in many different morphs and words. Thus there are two levels of language form composition, not just one. It has nothing to do with the duality of speaking and writing, and of course writing historically does not apply to the vast majority of languages.