> Ask some people how many golfballs fit in a bus. They'll be stumped. They'll have no idea how to proceed. They'll just stop, and look at you, and flounder. B

> Ask some people how many golfballs fit in a bus. They'll be stumped. They'll have no idea how to proceed. They'll just stop, and look at you, and flounder. Because, as ebbv said, there is absolutely no way they can get a decent level of accuracy that would be useful for any kind of purpose. Any estimate in such a situation would be thrown away as soon as Google and other resources are available. Therefore they effectively cannot answer the question, and the question is useless.