Kernrechtsfrage
Whether the requirements for revision of the disability pension under Art. 17 ATSG were proven
Extrahierter Entscheid
The finding of a decisive and lasting change in health status was not sufficiently established; the case required further factual clarification.
Extrahierte Begründung
The psychiatric evidence was not conclusive enough, and the insured person's credibility and the observational material were not properly assessed together.