«وَإِنْ قَامَتْ قَرِينَةٌ تُرَجِّحُ جَانِبَ قَبُولِ مَا يُتَوَقَّفُ فِيهِ، فَهُوَ الْحَسَنُ أَيْضًا لَا لِذَاتِهِ»
If a corroborating indication makes acceptance preponderant in a report previously held in suspension, it becomes hasan, but not intrinsically.
Hasan li-ghayrihi applies where a report initially falls below the intrinsic standard of acceptance yet suffers from a weakness that suitable independent supporting evidence can remedy. The type of deficiency and the actual independence of supporting routes must be examined.
Limits of corroboration: A demonstrably fabricated transmission or a severe, nonremediable fault does not become acceptable through ordinary parallel chains. Different written isnads repeating one defective source are not automatically independent evidence. The issue is credible external support, not raw numerical accumulation.