Waṣl links clauses by wāw; faṣl omits that link. Istiʾnāf is a meaningful form of faṣl: the sentence stands independently but answers a question generated by what precedes.
Omission of wāw does not mean the discourse lacks coherence.
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Faṣl, istiʾnāf, and waṣl
Explanatory Resumption (Istiʾnāf) and Types of Implied Question
Waṣl links clauses by wāw; faṣl omits that link. Istiʾnāf is a meaningful form of faṣl: the sentence stands independently but answers a question generated by what precedes.
Omission of wāw does not mean the discourse lacks coherence.