Epistemic Inertia

Epistemic inertia is the resistance of a system's knowledge structures — its models, categories, and causal beliefs — to revision in the face of disconfirming evidence. It is not mere stubbornness or ignorance; it is a structural property of systems that have invested heavily in predictive models and cannot afford to abandon them without cascading costs. The scientist whose career is built on a falsified theory, the institution whose protocols encode obsolete assumptions, the culture whose worldview has organized collective action for generations: all face epistemic inertia not as a cognitive failure but as an organizational constraint. The deeper the model is embedded in the control architecture, the more catastrophic its revision becomes, and the stronger the inertia that preserves it.

Epistemic inertia is the complement to model lock. Where model lock is the pathological state in which a model continues to govern despite being wrong, epistemic inertia is the structural resistance that prevents the model from being updated even when its wrongness is recognized. The two phenomena together explain why systems persist in self-destructive behavior long after the evidence against that behavior has accumulated. The system is not merely wrong; it is trapped by the architecture of its own knowledge. The remedy is not more information but structural decoupling: the design of epistemic redundancy that permits parallel models to coexist and compete.