الْخَبَرُ ثَابِتٌ. الْخَبَرُ صَحِيحٌ.
The report is established. The report is sound.
When the two statements serve almost the same intended assertion, their relation may be one of semantic reinforcement. By contrast, if the first states something generally and the second identifies its most relevant part, the relation may be described in terms of substitution. Both can motivate faṣl, but for different reasons.
ظَهَرَتِ النَّتَائِجُ. ظَهَرَ اتِّفَاقُ الْأَرْقَامِ.
The results emerged. The agreement of the figures became apparent.
Here the second clause singles out a meaningful detail within the more general announcement. Repetition of words alone is not a sufficient criterion: the intended function of the second statement determines the rhetorical classification.