Several people saw a frog on the road and caught it. They did not know what kind of animal it was, and while they were thinking, trying to guess, Mulla Nasreddin approached.
“Do you know,” they asked, showing him the frog, “what it is?”
“I know,” answered Mulla, “this is an animal whose mother and father were the same.”
Translated from Russian · original on wisdomlib.ru