For thousands of years, humans have asked: if our senses can be fooled, then how do we know that our world is real? Movies like The Matrix and The Truman Show expand on that concept, following protagonists who learn that their world is artifical, and that there is a “realer” world outside of the confines in which they have been placed. Write a story in which the protagonist starts to see cracks in their reality, but force the reader to ask: are they uncovering an illusion, or falling for a delusion? And how can we tell the difference?