Final answer:
In "The Nun's Priest's Tale," the fable magnifies the folly of human nature, particularly the way flattery can lead to poor decision-making and the consequences of overconfidence.
Step-by-step explanation:
"The Nun's Priest's Tale" is one of The Canterbury Tales by the Middle English poet Geoffrey Chaucer. Composed in the 1390s, it is a beast fable and mock epic based on an incident in the Reynard cycle. The story of Chanticleer and the Fox became further popularised in Britain through this means.
The aspect of human nature that is being magnified in "The Nun's Priest's Tale," part of Geoffrey Chaucer's The Canterbury Tales, is folly. In this humorous fable, the rooster Chauntecleer is tricked by a fox, demonstrating both the folly of overconfidence and the ease with which flattery can lead to one's downfall.
The tale satirizes human weaknesses, depicting characters that anthropomorphically represent these aspects. While a surface reading might suggest wisdom in the tale's conduct of the rooster and his dreams, the predominant theme is folly, seeing that ultimately, Chauntecleer's pride and gullibility overshadow any wisdom he might have.