I remember reading this story maybe 15 years ago - the style made me think of the 80es or 90es. I'm not sure if it was a short story, but I think it was.
The overall theme was that untruth in any form was banned, and in fact, there was a coming of age ceremony in which you were made to say things that were not true and punished with increasingly harsh electro shocks, after which you would be completely unable to even think of lying. One of the more humourous details was that even adverts and brand names were completely honest - I think a car model called 'Ford Adequate' featured.
It would be great to find this story again.