Rationalist fiction

Rationalist fiction is defined by structural principles that emphasize transparency and logic: • Internal Consistency: The setting operates under discoverable rules. Rather than serving as plot devices, supernatural elements function as systems that characters manipulate through observation and research. Authors often publish the underlying rules of their magic systems to allow for reader analysis. Within the community, this is sometimes referred to as "Level 1 Intelligence," where characters are shown thinking about the situation rather than just being described as smart. • Epistemology: The narrative serves as a vehicle for demonstrating instrumental rationality. Readers follow an internal monologue applying Bayesian inference or mitigating cognitive bias. The story progress is often tied to a character's increasing self-awareness or their ability to update their beliefs based on new evidence. == History and development ==

Following HPMOR, the genre expanded into other universes, often under the shorthand label ratfic. This expansion was heavily driven by online serial platforms and community-driven feedback loops. Alexander Wales used the Lex Luthor perspective in The Metropolitan Man to explore existential risk and the logical implications of a nearly omnipotent alien living on Earth. Other works include Mother of Learning, which applied rationalist principles to the "time loop" trope. Mainstream literary works are often categorized as being in dialogue with rationalist fiction due to their focus on credible biology and the mechanics of consciousness. Peter Watts's Blindsight and Ray Nayler's The Mountain in the Sea have been cited by critics at The New York Times, The Guardian, and Slate for their rigorous, logical approach to non-human intelligence. These works are distinguished from typical speculative fiction by their use of scientific paradigms to resolve central mysteries. The genre continues to evolve through collaborative writing and the "rationalist" blogging ecosystem, where tropes are analyzed and refined in real-time. == Notable works ==

• Harry Potter and the Methods of Rationality (2010 to 2015) by Eliezer Yudkowsky • Mother of Learning (2011 to 2020) by Domagoj Kurmaić • Unsong (2016 to 2017) by Scott Alexander • The Metropolitan Man (2014) by Alexander Wales == References ==