Not to pile on here, but this is not an instance of the birthday problem.
The birthday problem would kick in if we asked “what are the chances that any two of these N people know the same place, whatever it may be.”
But instead we’re discussing “what are the chances that one of these N people recognizes a specific place P.”
Deestan@lemmy.world 2 months ago
That would be a valid model. But you are still right that it doesn’t apply: It would give the effect that a different geoguesser would get the picture right every test, while we are seeing consistent results from the top geoguessers.