الْعَطْفُ
Coordination of one predication with another.
Adjacent clauses are not automatically suitable for coordination. A second clause may answer, explain or restart the discourse. Conversely, absence of wāw does not always show a weak relation: an exceptionally close relation may itself call for separation.
Before deciding, note the clauses’ grammatical positions, their semantic connection and the attribution implied by joining them. Those three checks prevent an elementary but damaging confusion between textual nearness and rhetorical joining.