# Simplexity Simplexity is the concept that complex systems often operate through surprisingly simple rules, while seemingly simple systems can exhibit underlying complexity. The term captures the interplay between simplicity and complexity, emphasizing how intricate behaviors can emerge from basic principles and how simplifying a system doesn’t necessarily mean making it less sophisticated. The term is used in various fields, from design and engineering to biology and human behavior, to describe how optimal solutions often balance complexity and simplicity in an elegant way.