Passage Summary: Because both humans and chimps can read 'vibes' from a face that isn't showing any emotion, this skill probably comes from our shared DNA rather than being something we learn from our specific cultures.

Conclusion: The ability to identify traits from neutral facial expressions is likely a product of primate biology rather than cultural learning.

Reasoning: Both humans and chimpanzees, who share a primate lineage, can accurately judge specific traits (extroversion in humans and dominance in chimps) just by looking at expressionless faces.

Analysis: The researcher is using an analogy between two related species to argue for a biological cause. To strengthen this, we should look for information that reinforces the biological link or rules out the cultural one. An answer that shows this ability is present in very young primates who haven't had time to learn it, or one that shows non-primates lack this ability, would bolster the claim that it is a specific biological inheritance.