I Have a book filled with Fairy Tales and one of the Fairy Tales is called Dan The Dunce. It is about 3 brother finding out that a princess wants to get married so she is testing clever men but only 2 of them were clever and the 3thd was a Dunce. The 2 brothers prepared for the test. They began on there trip to the palace. The 3thd son came along. Once they got there the 2 brothers forgot everything they learnt but the 3 brother made the princess laughed. He had passed the test and they got married.
