قَالَ الْمُخْبِرُ: تَأَخَّرَ الْقِطَارُ. الْخَبَرُ غَيْرُ صَحِيحٍ.
The informant said, 'The train was delayed.' That report is untrue.
If the final assertion is the current speaker's correction rather than part of the informant's report, its independence must be clear. Uncareful coordination might falsely suggest that the denial was also spoken by the informant.
This illustrates quasi-complete disjunction: where coordination risks wrong attribution, superficial similarity between the clauses is insufficient grounds for waṣl.