Arabic grammar is essential to understanding Qur’anic syntax, but later grammatical schools systematized many of their subsidiary rules after revelation. The opinion of any one grammarian should not be treated as an unchallengeable measure by which established Qur’anic wording is corrected.
When Basran and Kufan analyses differ, the interpreter weighs the canonical reading, context, and attested eloquent Arabic usage. This does not imply a lack of grammar; it means grammatical descriptions should be tested against authoritative linguistic evidence.
Principle: grammar helps explain the Qur’an; established revealed wording must not be rewritten merely to fit a later theoretical preference.