Two questions must remain separate when studying a report: How many independent routes transmit it? and Does the evidence justify accepting it? The first leads to mashhur, aziz, or gharib; the second leads to maqbul, mardud, and further hadith criticism.
Case A: Two reliable independent lines with no solitary bottleneck—structurally aziz, and potentially maqbul when the conditions of acceptance are met.
Case B: A narration with several routes but a consequential defect in its transmitters or text—possibly mashhur in spread, yet not automatically accepted.
Case C: One trustworthy narrator’s authentic solitary transmission—potentially sahih despite being gharib.
The next discussion concerns corroborating indicators (qaraʾin) accompanying ahad reports and how such indicators can affect the degree of knowledge they yield.