Final answer:
The irony in Chaucer having the pardoner tell the Pardoner's Tale lies in the fact that the pardoner himself is a morally corrupt character.
Step-by-step explanation:
The irony in Chaucer having the pardoner tell the Pardoner's Tale lies in the fact that the pardoner himself is a morally corrupt character. The pardoner is portrayed as a greedy and manipulative individual who uses religious authority to deceive people and profit from their sins. By having the pardoner tell a tale that exposes his own vices, Chaucer uses irony to comment on the hypocrisy and corruption within the church and society of his time.