زَيْدٌ شَاعِرٌ لَا كَاتِبٌ
Zayd is a poet, not a writer.
A coordinating restriction works most naturally when the affirmed and denied attributes are relevant competing descriptions. Introducing an unrelated denial can weaken coherence even when the syntax is technically possible.
Comparative review
DeviceRhetorical contribution
لاAffirms then denies a rival
بلTurns toward a replacement assertion
لكنCorrects a preceding expectation
ما…إلاExplicit negation followed by exception
إنماCompact restrictive particle