Step 1: Understanding the irony
In ‘The Third Level’ by Jack Finney, the protagonist, Charley, believes in the existence of a third level at Grand Central Station, which represents an escape from the modern world’s harsh realities. However, Sam, his psychiatrist, who dismissed Charley’s belief as a figment of imagination, ironically disappears and sends a letter from the third level.
Step 2: Explanation
The irony lies in the fact that Sam, who initially considered the third level to be a hallucination, ends up reaching it himself, proving that it exists.