Both constructions omit overt coordination, yet the reason for faṣl differs. With complete connection, the second clause emphasizes or substitutes for the first. With quasi-complete connection, it answers a question provoked by the first.
FeatureComplete connectionQuasi-complete connection
RelationshipEmphasis or substitutionImplied question and answer
Audience’s needFuller statement of the same meaningResolution of a question raised
Example«أَمَدَّكُمْ بِمَا تَعْلَمُونَ ... أَمَدَّكُمْ ...»«فَوَسْوَسَ ... قَالَ ...»
Both require faṣl, but the absence of wāw alone does not identify which kind is operative.