أَكْرَمْتُ الْحَاضِرِينَ، وَأَكْرَمْتُ شَيْخَهُمْ.
I honored the attendees, and I honored their teacher in particular.
If the teacher is among the attendees, mentioning him separately may be specific after general, drawing attention to his significance rather than merely repeating the fact that he was present.
If he is not included in the earlier collective, the classification would fail. The analyst must establish that the supposedly specific item actually belongs to the general set.