Here's why:
* Foreshadowing is a literary device where the author hints at future events, creating suspense and anticipation.
* In "An Occurrence at Owl Creek Bridge," the reader is initially led to believe Farquhar is a Confederate sympathizer, just like the Federalist agent. The reader is tricked into trusting the agent's words, just as Farquhar is.
* This deception sets the stage for the reader to anticipate danger, as we know Farquhar is now in a dangerous situation. The reader knows something is wrong, even if Farquhar doesn't.
The author uses this trickery to create a dramatic effect. The reader is left to ponder the consequences of Farquhar's actions, and the story's ending becomes even more impactful because of the foreshadowing.