What is primarily communicated by «Zaydun qāʾimun»?

The Separating Pronoun (Ḍamīr al-Faṣl): Restriction, Emphasis and Predication

• A plain attribution of standing to Zayd
• A universal denial of all standing
• Inevitable confusion of modifier and predicate
• Fronting an object as in iyyāka naʿbudu