Passage Summary: Because different groups of people have different sets of rules for what is right and wrong, the author thinks there isn't a single value that everyone in the world agrees on.

Conclusion: As long as distinct cultures exist, there will be no moral values that are shared across all of them.

Reasoning: Anthropological data shows that different cultures possess distinct and different moral codes.

Analysis: This argument makes a massive leap from 'distinct moral codes' to 'no shared values.' It assumes that because the overall systems (the codes) are different, there can be no individual points of overlap (the values). To weaken this, we would want to show that two cultures could have different laws but still value the same underlying principles, like the protection of children or honesty. Since this is a 'Weaken EXCEPT' question, four choices will likely point out this gap or provide examples of universal values, while the correct answer will either be irrelevant or actually support the author's cynical view of cultural isolation.