هَلْ زَيْدٌ قَامَ أَمْ عَمْرٌو؟
Did Zayd stand, or ʿAmr?
When connected am sets out two candidate agents and the action is presupposed, the question seeks taṣawwur. The source treats hal as inappropriate in this identification structure.
“A-Zaydun qāma am ʿAmrun?” appropriately asks which person stood. By contrast, “Hal qāma Zaydun am lā?” concerns affirmation versus denial and should not be treated as the same two-agent alternative.