But credibility in words has almost nothing to do with fact. Aristotle went so far as to say that a "probable impossibility" makes a better story than an "improbable possibility," meaning that a skillful author can sell us glass mountains, UFOs, and hobbits, while a less skilled writer may not be able to convince us that Mary Lou has a crush on Sam.

Janet Burroway, Writing Fiction, Tenth Edit…, loc. 56