Four distinct cases illustrate how an intrinsic chain grade and external support interact.
Report A: connected chain, upright transmitters, full precision, and no disqualifying contradiction or defect: sahih li-dhatihi.
Report B: the same safeguards but one narrator with somewhat lighter precision: hasan li-dhatihi.
Report C: a B-type route receives genuinely independent, credible support: if the corroboration is sufficient, sahih li-ghayrihi.
Report D: an isolated route has a compensable mild weakness, but meaningful additional routes support it: with adequate corroboration, hasan li-ghayrihi.
The actual judgment turns on each route's standing, agreement in the reported content, and possible defects—not on route count alone.