Why is al-Nawawī’s identification of the nisbah “al-Hamdānī” relevant?

Al-Ḥārith al-Aʿwar: Narrator Criticism, Variant Reports and Evidence

• It identifies Mughīrah rather than al-Shaʿbī
• It automatically authenticates all chains
• It clarifies al-Ḥārith’s relation to Hamdān and reduces confusion between similarly named figures
• It turns the passive “uttuhima” into an active verb