Barriers between you and I?
In "'Between you and I'" (10/5/2025), I quoted three theories that Merriam-Webster's Concise Dictionary of English Usage offers as possible explanations for the confusion over "between you and I" vs. "between you and me". The third of those theories cites Noam Chomsky, whose work is not usually part of usage discussion:
Another possible explanation (unnoticed by the comentaros) comes from the linguist Noam Chomsky. In his Barriers, 1986, he says that compound phrases like you and I are barriers to the assignment of grammatical case. This means that between can assign case only to the whole phrase and not to the individual words that make it up. Thus the individual pronouns are free to be nominative or objective or even reflexives. Chomsky's theory would also explain some other irregularities in pronoun use (See PRONOUNS); it's the best that has been offered so far.
I expressed skepticism about this theory, "for reasons to be discussed another time".
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