قَالَ رَجُلٌ: «الْمِيزَانُ سَلِيمٌ». ظَهَرَ الْخَلَلُ بَعْدَ الْفَحْصِ.
A man said, “The scale is sound.” A fault appeared after inspection.
The latter clause reports the narrator’s independent finding, not another part of the man’s speech. A connection that misleadingly makes the new finding part of the quoted speaker’s statement distorts attribution. Suitable separation helps the reader track the boundary between testimony and subsequent inspection.
The analysis depends on where the conjunction attaches; not every wāw is misleading. The decisive issue is the intended scope and speaker attribution, not a mechanical ban on a particular particle.