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In response to "I'm throwing the BS flag on this sporcle quiz. Name the 197 countries of the world and the average score is a 67%?!? No way. -- (edited)" by volnelk

It's self-selecting. People tend to take on quizzes they are likely to do well on. People who can only name, say, 50 countries wouldn't take the quiz

to begin with.

And also, people are completist - pass with 80% and they want to pass with 100%, which takes a bit of practice.


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