What is NOT established merely by identifying the kunyas of Muḥammad ibn al-Sāʾib al-Kalbī?

Narrator Anonymity: Wuḥdān, Mubham, Majhūl al-ʿAyn and Mastūr

• A person can have several designations
• A label can potentially be matched across routes
• Alternative names may generate confusion
• His integrity and precision are necessarily established