Mulla Nasruddin's son was entered into the school. The teacher was talking about geography and she talked and explained the shape of the earth and everything. And then she asked Mulla Nasruddin's son, "What is the shape of the earth?"
He remained silent, so just to provoke his answer she said, "Is it flat?"
The son said, "No."
She became more hopeful; she said, "Then is it a globe, round-shaped?"
Nasruddin's son said, "No."
Then she was surprised. She said, "Only two are the possibilities: either it is flat or it is global, and you say no to both. So what is your idea?"
The son said, "My Dad said it is crooked!"