What is the function of noting ʿAbd al-Raḥmān ibn Abī Laylā’s learning from ʿUmar and company with ʿAlī?

Historical Examples of Muʿanʿan Transmission and the Conclusion of Muslim’s Introduction

• Prove explicit ḥaddathanā from Anas in every report
• Establish all ʿanʿanah as connected unconditionally
• Establish historical context and actual transmission activity
• Reassign all ʿUmar reports to ʿAlī