أَدِبْسٌ فِي الْإِنَاءِ أَمْ عَسَلٌ
Is it syrup or honey in the vessel?
Connected am can pair alternatives after hamza, requesting that one candidate be specified. The question is which option fits an understood situation, not simply whether the situation exists.
By contrast, “A-qāma Zaydun am lā?” sets occurrence against non-occurrence and concerns assent. Shared use of am does not make the two interrogatives functionally identical.