What is the primary rhetorical force of a-lam yajidka yatīman fa-āwā?

Supplementary Practice 18: Rhetorical Analysis of Sūrat al-Ḍuḥā and Sūrat al-Sharḥ

• Eliciting acknowledgment of a known favor: rhetorical taqrīr
• Requesting an entirely unknown historical date
• Denying the prior favor
• Issuing a general imperative about orphans