May ʿAmr also be a writer despite “Zayd is only a writer”?

Qasr: Definitions, Real and Relative Restriction, and Ifrād, Qalb and Taʿyīn

• No, that is impossible
• Yes; it narrows Zayd’s properties, not the writers
• No, it establishes only Zayd’s existence
• Yes, because it contains no predication