What is the force of a-laysa Allāhu bi-aḥkami al-ḥākimīn?

Supplementary Practice 26 — Comparative Rhetoric of Sūrat al-Qāriʿah and Sūrat al-Tīn

• A confirmatory question seeking acknowledgment of divine justice
• An explicit denial of divine justice
• An unrelated expression of surprise
• Putting an imperfect verb into the jussive