Kernrechtsfrage
Whether the insured's residual earning capacity and knee-related sequelae were sufficiently clarified for final pension assessment.
Extrahierter Entscheid
The medical file was insufficient, especially regarding the left knee condition and its effects on earning capacity; further investigations were required.
Extrahierte Begründung
The only reliable medical assessment was outdated, later examinations did not resolve the knee issue, and the condition was still described as developing with an uncertain outcome.