And the quit rates were particularly convincing given that before the study started, most of the people had said they'd rather cut down gradually before quitting.

It is not convincing if you say you have chosen the subject because you enjoy it.

The International Union for Conservation of Nature had previously considered the area a "possible range" for the species, and local people had reported seeing lions in the area, but no one presented convincing evidence.

But convincing open-minded dairy people is actually not that hard, when you look at the economics.

To her, it meant moving confidently around the court room, using convincing body language, and projecting her voice so it could be heard from the judge's bench to the back door.

We need more scientists who can explain what they are doing in language that is convincing and understandable to the public.