أَتَقُولُونَ عَلَى اللَّهِ مَا لَا تَعْلَمُونَ
Do you say about Allah what you do not know?
The interrogative here uses hamza. In context it does not merely solicit information; it censures speaking without knowledge of Allah. The question thus functions rhetorically as reproach and denial.
Restricting it to an ordinary request for yes/no information would lose the contextual force. The example illustrates the flexibility of hamza alongside the narrower normal function attributed to hal.