The article "pinned" two opposite categories, and built a hypothetical world where everyone falls into a category but is ignorant of the categories' existence.

The article "pinned" two opposite categories, and built a hypothetical world where everyone falls into a category but is ignorant of the categories' existence. You could just as easily "pin" the categories: - people who believe disagreements are based on firm moral underpinnings - people who take advantage of the first group and be no less wrong