If the Qur'an is the source of grammatical and Arabic rules, does that negate its linguistic inimitability, given that it is judged by itself and not by external rules?

The Quran is miraculous in its wording and meaning. Its miraculous nature encompasses its eloquence and style, its foretelling of the unseen, and its revelation of cosmic truths. Allah Almighty challenged humans and jinn to produce a text like it, or even a single surah (definition) from it, but they failed to do so despite their eloquence and the presence of motives for opposition. The miracle of the Quran continues until the Day of Judgment. The fact that it remains fresh and vibrant, combines grandeur with sweetness, and renders other books unnecessary, all attest to its miraculous nature.