Passage Summary: A company says their two-ingredient product stops cravings. A study showed the first ingredient doesn't work alone. The author says if the second one also doesn't work alone, the whole product is a failure.

Conclusion: If the second ingredient of NoSmoke also fails to reduce cravings when tested individually, then the product as a whole does not work.

Reasoning: The first ingredient failed to reduce cravings in a study, and the product only contains two ingredients.

Analysis: This argument ignores the possibility of a 'synergistic effect.' Even if Ingredient A and Ingredient B do nothing by themselves, they might work effectively when combined. The author assumes the whole is merely the sum of its parts, which is a common logical trap in science-based stimuli. Look for an answer that identifies this failure to consider how ingredients might interact with each other to produce a result that neither could achieve in isolation.