Yazeed and Saadiq were traveling through the desert. It was so hot that the air was shimmering. In the distance they saw something black on the ground. Saadiq said, "It's a vulture." Yazeed said, "No, it's a goat." They drew closer, still arguing over what it was. Saadiq threw a rock at it. It flapped its wings heavily and lifted into the air.
"See!" said Saadiq. "I told you it was a vulture."
"That doesn't prove anything," said Yazeed. "It could be a goat with wings."