Kernrechtsfrage
Whether the assailant's own conduct was an adequate cause justifying a reduction of the victim's civil liability under Art. 44 OR.
Extrahierter Entscheid
Yes. The violent and unlawful attack triggered the risk of counterforce and remained a legally relevant cause of the damage, so liability could be reduced.
Extrahierte Begründung
A person who intentionally and unlawfully attacks another must expect defensive resistance. Even if the defense exceeds self-defense limits, the causal link to the initial assault is not broken; the victim's self-defense can therefore justify a reduction of damages.