Exhaustion

We exhaustively examine every naturalistic theory: (1) Borrowing theory—no evidence of sources; the Prophet ﷺ was unlettered and isolated from scholars. (2) Epilepsy/mental illness—cannot explain coherent legal systems, prophecies, or literary genius. (3) Poetry theory—Arabs themselves rejected this; the Quran is neither poetry nor prose. (4) Learned from others—no teacher identified; style is unique. (5) Gradual composition—contradicted by instantaneous revelations. All theories fail; divine origin alone remains.

This is proof by exhaustion: we systematically examine every proposed naturalistic explanation, refute each one, and conclude that divine authorship is the only explanation that survives scrutiny.