هَلِ الْحَرَكَةُ مَوْجُودَةٌ؟
Does motion exist?
A simple hal-question asks whether a thing exists: does motion exist or not? Its target is existence itself, not primarily the attribution of a further property.
A compound hal-question asks whether an entity accepted in the discourse possesses another property, such as permanence. Both request assent, but their subject matter differs: existence versus predication of a quality.