If you also require people to post their country of longest term residence, I think you'll get some interesting data. Depending on where you were educated/have spent the most time, I think there will be significant differences in how much people know about other countries.

(Posting from Australia, I could name Nadi and Suva in Fiji - that's it!)

Hmmm, is Libreville there, or in neighbouring Republic of Congo or Equatorial Guinea?

It is there! Phew, saved from the embarrassment of 0 lol

Wait how do I edit, forgot to add 0