Kernrechtsfrage
Whether the reduction from a full invalidity pension to a half pension as of 2001-04-01 was lawful.
Extrahierter Entscheid
The reduction was upheld because the cantonal court did not establish the insured person's work capacity in a manifestly incorrect way.
Extrahierte Begründung
The Federal Court reviewed only limited factual errors. It found the cantonal court's assessment supported by expert reports and an evaluation-stage report, and the contrary medical opinions did not suffice to undermine that assessment.