Kernrechtsfrage
Whether the cantonal court violated the right to be heard by refusing personal examination and witness testimony from treating doctors.
Extrahierter Entscheid
No violation: there is no constitutional right to oral statement before the deciding authority, and the refusal of further evidence was justified by anticipatory assessment of the existing record.
Extrahierte Begründung
The claimant could present his arguments in writing; the request to hear treating physicians had no independent scope beyond evidentiary assessment.