Is it legitimate to analyze alladhī aṭʿamahum as syntactically descriptive and rhetorically explanatory?

Supplementary Practice 21: Comparative Rhetorical Study of Sūrat Quraysh and al-Māʿūn

• Deny any explanatory force without an overt causal particle
• Yes; syntax and discourse effect can coexist at different levels
• Insist that only full substitution is grammatically possible
• Make the relative clause an imperative solely because it helps explain