Several companies that make herbal teas containing ginseng assert in their marketing that ginseng counteracts the effects of stress. As a result, many people buy these products hoping to improve their health. Yet no definitive scientific study links ginseng with the relief of stress. Thus, these marketing campaigns make false claims.
The reasoning in the argument is flawed in that it concludes that a claim is false merely on the grounds that it has not been shown to be true.