What rhetorical principle applies to the negative report “مَا جَاءَ زَيْدٌ”?

ʿIlm al-Maʿānī: Predication, Emphasis, and Rational Metaphor

• Negation never accepts emphasis
• Negation is necessarily inshāʾ
• Negative reports are always true
• Negative reports can also be tailored to hesitation or denial