Biographical criticism asks both whether the narrator possesses integrity (ʿadālah) and how reliably the narrator preserves and transmits (ḍabṭ) information. Integrity involves truthfulness and moral reliability; precision concerns memory, attention, accurate books, and the tendency to err.
The terms of criticism differ in severity. Some imply deliberate dishonesty, while others point only to weak retention. Likewise, different formulations of endorsement do not imply the same degree of confidence.
A person’s biography, a qualified critic’s judgment of the person, and the grade of one particular report are three related but distinct objects of inquiry. A generally reliable transmitter can err in a specific narration, while mild weakness may sometimes be mitigated by sound corroboration.