Kernrechtsfrage
Whether the cantonal court could depart from the psychiatric expert report and reduce work capacity only by 10% because of fluctuating impairment.
Extrahierter Entscheid
No. The expert's assessment of 50% incapacity in all activities, referred to a 100% workload, had to be followed; the court may not replace medical evaluation with its own.
Extrahierte Begründung
The fluctuation of depressive symptoms was already accounted for in the expert opinion. Determining work incapacity is exclusively a medical task, and the cantonal court's contrary inference was objectively unsustainable.