Passage Summary: Scientists argue about whether Neanderthals were a different species from us. The author thinks they were the same species because they used the exact same tools, even though they lived in different places.

Conclusion: Neanderthals and Cro-Magnons were likely members of the same species.

Reasoning: They used identical tools despite living in different environments, which implies they shared identical behavioral responses to daily challenges.

Analysis: We are looking for something that cannot be true based on the provided rules. The stimulus establishes a strict conditional: if they used similar tools in different environments, they must have faced the same challenges and met them in the same way. Therefore, any statement claiming they used the same tools but faced different challenges or responded differently would directly contradict the passage. Focus on finding an answer choice that violates this 'same tools implies same challenges' rule.