Kernrechtsfrage
Whether the cantonal court violated federal law by accepting a 50% work incapacity and granting a half invalid pension.
Extrahierter Entscheid
The cantonal court was entitled to rely on the MEDAS expertise and to treat the depressive disorder as the main disabling illness; the pension award stands.
Extrahierte Begründung
The depression was not merely a comorbid factor to a somatoform pain disorder, but an independent psychiatric illness with predominant impact on work capacity. The MEDAS experts consistently assessed 50% incapacity and excluded non-disabling social factors.