$PI When we were young, we learned a story called "The Boy Who Cried Wolf." When the shepherd boy said "the wolf is coming, the wolf is coming," the adults believed him and went out to hunt the wolf, but there was no wolf. Later, the shepherd boy cried wolf again, and the adults chose to believe him and went to look for the wolf, but the wolf still didn't come. As a result, the adults became angry and no longer believed the shepherd boy. The third time the wolf really came, the shepherd boy shouted "the wolf is coming, the wolf is coming," but this time the adults didn't believe him anymore.