الإِلْمَامُ وَالسَّلْخُ
Transferring an earlier thought into a different expression without carrying over its distinctive wording.
Salkh evokes stripping a meaning from its earlier verbal covering; ilmam suggests approaching or drawing upon an existing idea. The focus is on continuity of thought beneath different diction.
The category becomes recognizable where literal copying is absent but a distinctive conceptual relationship remains.