Admitting product flaws makes you more believable

Telling the truth is disarming.

On a 10-day visit to China in 1980, New York's mayor Ed Koch saw thousands of Chinese using bicycles in big cities.

Koch visited Beijing, Xian, Hangzhou, and Shangai, and he was very impressed. 

He saw bicycles everywhere. So he thought, "Isn't this marvelous? All these people are bikes. I gotta do something about that in …