The Great Gatsby
a satisfactory hint of unreality
Could you please explain me the meaning of the word "hint" in the phrase "satisfactory hint of the unreality of reality" in the following excerpt of the chapter 6 of The Great Gatsby by F. Scott Fitzgerald?
For a while these reveries provided an outlet for his imagination; they were a satisfactory hint of the unreality of reality, a promise that the rock of the world was founded securely on a fairy’s wing.
Thank you.