Why is afalā yaʿlam described as a rebuking question?

Supplementary Practice 25 — Comparative Rhetoric of Sūrat az-Zalzalah and Sūrat al-ʿĀdiyāt

• It contains an explicit imperative form
• It reproaches failure to recognize reality rather than merely requesting information
• It totally negates the coming event
• Because it contains an oath particle