In complete connection, the second clause is so integrated with the first that it emphasizes or substitutes for the same intended assertion. Quasi-complete connection introduces a different relation: the first clause raises an implied question, and the second provides the answer.
The second statement need not replace the first proposition. It completes an implicit question-and-answer exchange. Since an answer normally follows its question without coordinating wāw, faṣl is used between the two expressed clauses. The reason for separation is now the underlying conversational structure.