Principlev1PR-475
Store properties at the highest applicable hierarchical…
Store properties at the highest applicable hierarchical level and let inheritance distribute them to avoid redundant specification.
Why This Is a Principle
Derives from Hierarchical Chunking Expands Capacity (hierarchical organization enables treating groups as units) and Complex systems that work evolved from simple systems… (complex systems that work evolved from simple systems that worked). This is Collins and Quillian's 'cognitive economy' principle applied as design guidance. It tells you WHERE to define properties in a hierarchy (at the highest applicable level) and WHY (elimination of redundancy). Actionable, general, derived.