The real question is how rule based natural language systems can evolve. Otherwise they are subject to becoming moribund.

Of course that's not simply learning the latest usages on the cutting edge of human language evolution. Rather, natural language AI evolves concurrently with the technology people use to communicate, which technology (heavily?) influences their language use.

I'd go so far as to suggest the influence of technology on language is more important than historical rules of verbiage and exceptions.