زَيْدٌ شَاعِرٌ لَا كَاتِبٌ
Zayd is a poet, not a writer.
When the listener believes both attributes apply, the denial of writing removes the assumed sharing. This is an appropriate context for qasr al-ifrād; the rhetorical classification depends on the disputed assumption, not simply on the particle.
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Qasr by Coordination, Negation–Exception, and Innamā
زَيْدٌ شَاعِرٌ لَا كَاتِبٌ
Zayd is a poet, not a writer.
When the listener believes both attributes apply, the denial of writing removes the assumed sharing. This is an appropriate context for qasr al-ifrād; the rhetorical classification depends on the disputed assumption, not simply on the particle.