As usual, had to come across something very amusing in the weekly market at Moreton-in-marsh. There was this lady selling cheap waterproof light jackets. But was amused to see "... up to 2 hours" under 'Waterproof'! When asked, she was honest in acknowledging that after two hours, you get wet!!
She could have very well titled it as 'waterproof' and left it at that. None would have questioned her! But she was honest and sincere in putting up this deficiency of the jackets! Some business ethics there!