Principlev1
Distinguish between hypothesis failure (wrong theory),
Distinguish between hypothesis failure (wrong theory), execution failure (inconsistent implementation), and measurement failure (inadequate detection) when experiments produce negative results, as each type requires different corrective action.
Why This Is a Principle
Derives from Illusion of Explanatory Depth (metacognition has distinct levels) and Schemas as Knowledge Organization Structures (schemas organize knowledge). The principle follows: given metacognitive monitoring and knowledge organization through schemas, classify failure types to guide schema updating. This is diagnostic methodology derived from learning architecture.