Sometimes the first sentence immediately raises a question in the listener's mind. The next sentence answers it even though no question was spoken. This relation is called near-complete connection (شبه كمال الاتصال): a virtual question mediates between the two sentences.
«فَتُنَزَّلُ مَنْزِلَتَهُ فَتُفْصَلُ عَنْهَا كَمَا يُفْصَلُ الْجَوَابُ عَنِ السُّؤَالِ»
The next clause is treated like the answer to a question, and so is separated from the first as an answer is separated from its question.
For example, “He refused. The condition had not been met” naturally answers “Why did he refuse?” The second clause is not merely another coordinated report.