Shuʿbah’s letter (72): A specialist’s explicit practical instruction, attached to a named transmitter.
Ṣāliḥ al-Murrī (73): Two critical reactions whose particular reports must remain distinct.
Al-Ḥasan b. ʿUmārah (74): A claim checked against the alleged teacher’s own answers.
Ziyād b. Maymūn (75–76): Shifting teachers, other adverse testimony, his own denial of meeting Anas, and continued narration after stated repentance.
Reducing these different kinds of proof to the single label “weakness” obscures the reasoning of the critics.