The Cultural Differences Argument is the following:
- Different cultures have different moral codes.
- Therefore, there is no objective "truth" in morality. Right and wrong are only matters of opinion and opinions vary from culture to culture.
- Some people believe that the earth is flat, whereas others believe that it is an oblate spheroid.
- Therefore, there is no objective "truth" in geography (i.e., there is no fact of the matter about whether the earth is flat or an oblate spheroid).