A merchant owed money to a moneylender, but he couldn’t repay it. The moneylender proposed a deal in front of the merchant’s daughter. He would forgive the debt if he could marry her. He put two pebbles in a bag, one black and one white. If she picked the white one, she would be free from the debt; if black, she would marry him. But the moneylender put two black pebbles in the bag.
How did the merchant’s daughter outsmart the moneylender?