Read the passage and choose the appropriate title.
One day a man was crossing a river in a small boat. He asked the boatman if he knew anything about geography. "Oh, no, - said the boatman, - I don`t know anything about it". "I`m sorry for you, - said the man, - a quarter of your life is lost". A few minutes later the man asked the boatman again. "Do you know anything about mathematics?". "Oh, nothing", - said the boatman. "I’m sorry for you, a quarter of your life is lost", - said the man. At that minute the boat ran on a stone. The boatman jumped up and said: "Can you swim?". "Oh, no, - said the philosopher, - I can`t swim". "I`m very sorry for you", - said the boatman, - your whole life is lost. The boat is going down".