I do not believe fiction creates knowledge, more that it helps people understand and come to terms with the unknown. Sometimes the unknown can be terrifying, fiction can put those fear to rest. For example in Hasif Aminis Words Without Borders it talks about many years ago when people looked up into the night sky they would see points of light and over time people drew imaginary lines to connect them. Creating things like the rap, goat, fish and twins which to this day we use in astronomy. I believe if I were living at that time it would almost put me at ease seeing a “crab and goat” instead of a mysterious night sky that is filled with unknowns. Stories have been told for many, many years and past down through generations, most are filled with imagery and descriptive words to help give a better understand and visual of things. I believe that imagination and fiction play hand and hand, to understand most of these tales and stories you have to allow your imagination to get you there. Using the descriptive language you can picture a visual of what is being written about.
Enlightenment thinkers had the same sort of imagination, by stepping away from the facts of the church and stepping out of the box. They questioned things and gave an understanding or what they believed was an understanding to the unexplainable. They thought of new ways to explain things other than just accepting them and not knowing they questioned and came to conclusions.