Principlev1
Establish single sources of truth for each data type to
Establish single sources of truth for each data type to prevent information duplication and the entropy of maintaining multiple conflicting versions.
Why This Is a Principle
This derives from common cause vs. special cause variation (Process variation consists of two fundamentally different) and unresolved commitments consuming working memory (Open-Loop Cognitive Cost (Zeigarnik)). The principle prescribes architectural constraint—one canonical location per data type—to reduce cognitive overhead and synchronization failures.