طَلَعَ الْفَجْرُ وَانْتَشَرَ النُّورُ.
Dawn appeared and light spread.
The clauses express separate yet naturally connected judgments. Their jāmiʿ is the intelligible connection between dawn and spreading light, not a coincidence of rhyme or grammatical shape. Coordination can represent the pair as related assertions.
Lexical resemblance without meaningful discourse relation is not enough. Nor does every semantic link justify wāw if coordination implies a false common scope. The relevant subjects, predicates, and communicative purpose determine whether waṣl is rhetorically coherent.
A jāmiʿ may be rational, estimative (as with contraries), or imaginative (learned association). Mere lexical resemblance establishes none of these by itself.