> So the text should be something like: "For icons that solely act as labels or instructions" (+ SOLELY?!)
Personally, I thought the current text was clear on that. However, if others disagree then the case to cover is where icons are required to understand the label/instruction. If they are not relied on (tested by removing them), then they are not in scope.
So I think it would be the other way around: The object to test is the label/instruction, not the icon as such.
“For icons that are relied on to act as labels or instructions…”.
Cheers,
-Alastair