Kernrechtsfrage
Whether the insured's health had significantly worsened so as to justify a revision of the half disability pension
Extrahierter Entscheid
No legally relevant change in circumstances was shown; the half pension remained justified.
Extrahierte Begründung
The cantonal findings that the medical situation had not changed in a legally decisive way were factual findings binding on the Federal Supreme Court absent manifest inaccuracy. The competing medical reports did not establish a preponderant worsening.