Two men, close friends at that, attended a birthday party and on their way home stopped to rest under a mango tree. Then the bald one named Luis said his companion, "Andres, do you see those black ants on that big tree up that mountain?"

Andres replied, "My friend, I think that mountain is more or less 10 kilometers from us. I can't see those black ants but I can hear them laughing at us."