Kernrechtsfrage
Whether the appellate court violated constitutional rights by treating the slope's pre-existing stability and vegetation as insufficiently contested.
Extrahierter Entscheid
No constitutional violation was shown; the court could require a substantiated denial of those facts under the adversarial system.
Extrahierte Begründung
Only contested facts must be proven. The appellants did not specifically challenge the slope's prior stability or natural vegetation in the cantonal proceedings, so the court did not misapply burden-of-proof rules or act arbitrarily.