Kernrechtsfrage
Whether the 1999 grant of an invalidity pension could be revoked by reconsideration under Art. 53(2) LPGA
Extrahierter Entscheid
The conditions for reconsideration were not met because the original grant was not shown to be manifestly erroneous on the facts and law existing at the time.
Extrahierte Begründung
The authorities relied on later medical evidence and a re-evaluation of the file, rather than showing that the original decision was clearly wrong in light of the evidence available in 1999. A later more careful assessment does not suffice.