Order as the Default Outcome Under Constraint — Coherence as Constraint-Visible Structure

This paper clears a single, widely used term: coherence. It corrects a recurring misread — treating coherence as something that must be added to the world (by intelligence, design, or luck) — and replaces it with a plainer claim: coherence is order made visible by constraint. When constraints such as symmetries, conservation laws, couplings, boundary conditions, or energy and entropy flows restrict the states and trajectories a system can occupy, the system often settles into stable structure — invariants, attractors, stable statistics — with no internal model, goal, or learning required. The paper draws two lines in particular: coherence is not intelligence (which additionally requires feedback-driven learning), and coherence is not complexity (a crystal is highly coherent yet simple; turbulence is complex yet coherent in its statistics). It offers an operational definition and a short, reproducible checklist for deciding whether a system is genuinely coherent, worked through on the Lorenz system, whose structure lives in the ensemble rather than the individual trajectory. The aim is conceptual hygiene, not new theory: coherence is constraint made visible. This is the first of five short "Prime" papers — a conceptual-hygiene layer that, within Universal Collapse Theory, sets how the framework is read. But the Primes are written to stand on their own and ask no commitment to that framework: each clears a term the reader already holds and can judge on its own ground. This one is for anyone — in physics, biology, cognitive science, or philosophy — who reasons about order, randomness, chaos, or intelligence and wants to keep constraint-made-visible from being mistaken for something more mysterious.