I would argue there's a large grey zone. It isn't binary, I'd say it is more of a spectrum between prescriptivism and descriptivism. After all, grammar and synt

I would argue there's a large grey zone. It isn't binary, I'd say it is more of a spectrum between prescriptivism and descriptivism. After all, grammar and syntax isn't fully randomized even if largely arbitary. We make certain choices (even if we aren't aware of it) prescriptively which we try to teach each other (even if we aren't aware of it), and the mixing and noise creates a set of choices in the language actively in use that simply needs to be described for what it is. There's recurring patterns of various sources. And if they allow one sentence to be understood by members of the intended audience that knows the common rules and context and usage well, then that's as valid as it gets. Even if only very few can understand it, the fact that it is possible is enough. A bit like HTML in browsers - there's the written rules and there's what browsers do anyway, and what's valid in real life is whatever gets the point across.