What about allegories and thought experiments?
Two examples on the top of my head:
1. The strange cave of Ali Baba (or how to explain Zero-Knowledge protocols to your children) - Jean-Jacques Quisquater - Advances in Cryptology - 1990.
2. The fable of the Tyrant Dragon - Nick Bostrom - Journal of Medical Ethics, 2005¹. This is a work of fiction designed to make a statement about the stance of society towards fighting aging.