Obscure images as labels

Hello

If I have a button and the visible label is an icon or image which is basically very abstract and it isn't possible to infer the purpose of the control from the icon alone, but the button has a clear accessible name, does this fail 'headings and labels' please? It almost feels as though there is no label at all if the label is just a useless image or icon that does not clearly indicate the purpose of the control, in which case I even think there's an argument that it fails 'labels or instructions'. I have seen icons for say 'settings' labelled by images of animals (because this image was the company logo) which is entirely unrelated to. The accessible name was 'settings' but this doesn't fail label in name as the label is an image.

Thanks

Sarah

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