It would be such a joy to bend the truth and say that "The Invention of Lying" lives up to the potential of its inspired premise.
The conceit -- that an alternate universe exists where everyone tells the truth all the time -- sets up an uproarious beginning. People say what they really think to friends, co-workers, even strangers -- but rather than bringing out the best of humanity, it reveals the cruelly judgmental worst. A woman says to a man on a first date, "I don't find you attractive." The waiter admits upon approaching their table, "I'm very embarrassed I work here," then takes their drink order.