Mulla had to take a long journey. To make sure he didn't lose his identity along the way, he tied a hollowed-out gourd around his neck on a string. One night while he was sleeping at an inn, a prankster slipped the gourd off Mulla's neck and tied it around his own. When Mulla woke up the next morning and saw the gourd on the other guy's neck, he panicked. He tapped the man on the shoulder and said, "Excuse me... based on the gourd, I am clearly you. But in that case, who am I?!"