Is the story in The Catcher in the Rye true or false? Why can so many things happen in four days? Why does the author know the names of those dancers and others?

The Catcher in the Rye was a novel by J.D. Salinger about the lonely but fulfilling days of a teenager, Holden Caulfield, in New York City. The events and characters described in the story, including the dancers, the police, and the principal, were all real. However, the plot and the names of the characters described in the story were not directly experienced by the author, but constructed through fiction and imagination. Therefore, the author only mentioned the names of some basic characters and some events that he had not personally experienced. As for why so many things could happen in just four days, it might have something to do with the plot and character setting of the novel. In the novel, Holden Caulfield was a rebellious teenager who longed for freedom and independent thinking but felt lonely and helpless. Therefore, the plot and character setting in the novel revolved around Holden. He experienced many different events in four days. These events were all to portray Holden's character image and highlight his growth. Finally, regarding the names of the characters in the novel. Some of the names mentioned in the novel were real, while others were constructed through fiction and imagination. For example, the characters such as dancers and policemen were fictional, but through Holden's perspective, the author presented the actions and stories of the characters such as dancers and policemen to the readers, making them resonate with each other.