A narrator known for tadlis does not necessarily transmit every report defectively. If a particular narration is expressed with explicit hearing—for instance “samiʿtu” or “ḥaddathanī”—and the circumstances support the claim, the specific problem attached to ambiguous “ʿan” is removed.
«حَدَّثَنِي شَيْخِي»
My teacher directly narrated to me.
Such wording claims direct transmission, but its reliability still depends on the narrator's integrity, precision, and other evidence. Explicit hearing addresses this particular interruption concern; it does not automatically satisfy every condition of authenticity.
Hence an ambiguous report by a mudallis, one with explicit hearing, and an independent connected route are evaluated separately.