Principlev1
Test candidate keystone habits bidirectionally: genuine
Test candidate keystone habits bidirectionally: genuine keystones improve other domains when present and degrade them when removed.
Why This Is a Principle
Derives from The behavior of a system arises from its structure, not from (system behavior arises from structure) and Habits as Context-Response Associations (habits create stable behavioral patterns). This is a diagnostic principle—how to empirically test whether a habit is load-bearing versus isolated. Prescriptive about the testing method, actionable, and general across habit types.