What does Muslim NOT claim to have independently established in the ʿAbd Allāh ibn Yazīd example?

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

• He transmits Prophetic reports through Ḥudhayfah and Abū Masʿūd
• He was known to have seen the Prophet
• A specific recorded encounter with both Companions is preserved
• The reports are offered as examples from accepted critical practice