How do “mā adrāka” and “fa-mā lahum lā yuʾminūn” chiefly differ?

Supplementary Practice 29 — Comparative Rhetoric of Sūrat al-Infiṭār and Sūrat al-Inshiqāq

• The first magnifies awe; the second rebukes unbelief
• The first is a condition, the second an oath
• Both merely ask for names
• Both are necessarily pure reports