“Al-Mughīrah b. Saʿīd” is a full personal identification; he must not be assumed identical to every earlier transmitter called simply “Mughīrah.” Names are resolved through lineage and the network of teachers and pupils.
Al-Nawawī transmits two proposed identifications of the Abū ʿAbd al-Raḥīm criticized here: Shaqīq al-Ḍabbī al-Kūfī al-Qāṣṣ, the storyteller of Kūfah, and Salamah b. ʿAbd al-Raḥmān al-Nakhaʿī. According to his commentary, both bore this kunyah and both were considered weak. These are alternative identifications of a person named by kunyah, not two names proven to denote one individual; the passage does not settle the disputed identity conclusively.
The storyteller Shaqīq must also be distinguished from the reliable Successor Abū Wāʾil Shaqīq b. Salamah. The following report explicitly says «وَلَيْسَ بِأَبِي وَائِلٍ» (“he was not Abū Wāʾil”), preventing a criticism of one narrator from being assigned to the other.