Usually it does have all the information, it just isn't able to put it all together. If you for instance ask it to name the female tennis players who have won the Wimbledon tennis tournament twice, but not more than twice, it will give you a plausible list of names, but at least half of the names on the list will be wrong.

If you then ask it to tell you more about one of the players that has been wrongly named, it will actually be able to tell you the correct number of Wimbledon wins for that player. It does know the facts. It just doesn't know how to put the facts together into new useful knowledge.