What core rhetorical principle is illustrated by both surahs?

Supplementary Practice 22: Comparative Rhetorical Study of Sūrat al-Kāfirūn and al-Naṣr

• Treat all repetition as padding and all brevity as omission
• Derive every doctrinal conclusion from morphology alone
• Analyze each construction by its discourse situation, relation, and meaningful effect
• Call every wāw circumstantial without distinction