Passage Summary: Because high fat is bad for you, a brownie with no fat is automatically better for your health than a cookie that has a lot of fat.

Conclusion: Fat-free brownies are a healthier choice than high-fat cookies.

Reasoning: High-fat foods are generally unhealthy, and since the brownies lack fat while the cookies are high in it, the brownies must be the healthier option.

Analysis: This argument suffers from a classic 'single-variable' flaw. It assumes that because one unhealthy attribute (fat) is absent, the product is overall 'healthier,' ignoring other factors like sugar, calories, or artificial additives. I'll bet these 'healthy' brownies are loaded with sugar to make up for the missing fat. To parallel this, look for an answer that compares two things based on one negative trait and concludes one is better overall simply because it lacks that specific trait.