Weakening an Argument: Beverage Company Claims

Very Easy Critical Reasoning Evaluating Arguments

In a recent advertising campaign, a popular beverage company claimed that its new low-calorie drink can help people lose weight when combined with exercise. The company based its claim on a study suggesting that participants who drank the low-calorie beverage while exercising lost more weight than those who did not consume any beverage during their workouts.

Which of the following, if true, would most seriously weaken the company's argument?

Participants in the study also followed a strict diet while exercising.

Many people prefer high-calorie drinks to low-calorie options.

The low-calorie drink contains ingredients that are known to support weight loss.

The study did not include a control group that only exercised without consuming any beverage.

Hint

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