Here's why:
* Chauntecleer is blinded by his own vanity: He dismisses the warnings of his wife, Pertelote, about the potential danger of a fox. He believes himself to be too smart and too strong to be caught.
* The audience is aware of the fox's cunning: We know from the story's opening that a fox, known for its trickery, is lurking nearby. This knowledge creates a sense of anticipation and suspense.
* The irony lies in the contrast: We, the audience, are aware of the danger Chauntecleer faces, but he is completely oblivious. This contrast between the audience's knowledge and Chauntecleer's ignorance creates a powerful dramatic effect.
The result of this irony is a dramatic and entertaining fall for Chauntecleer, as he falls victim to the fox's clever ruse, despite his self-assuredness. The audience is left with a sense of amusement at his downfall, but also a cautionary reminder about the dangers of hubris and overconfidence.