How does the use of unreliable narrators in literature influence readers' perception of truth?

In literature, unreliable narrators serve as a powerful tool for authors to challenge readers' understanding of reality. These narrators, who may be biased, deceitful, or mentally unstable, compel readers to question the veracity of the story being told. By examining works such as "The Catcher in the Rye" by J.D. Salinger or "Life of Pi" by Yann Martel, one can explore how authors employ this narrative technique to blur the lines between fact and fiction. This approach not only creates a sense of suspense and intrigue but also encourages readers to engage critically with the text, question their assumptions, and interpret the narrative from multiple angles. How does this complexity alter the reading experience, and what does it reveal about the nature of truth itself?