Questione giuridica chiave
Whether the public-law appeal could challenge the cantonal judgment despite its double motivation.
Decisione estratta
Because the cantonal court relied on two independent sufficient grounds, the appellant had to attack both; it failed to contest the subsidiary finding on lack of damage.
Motivazione estratta
If a decision rests on alternative or subsidiary sufficient reasons, each must be challenged with the appropriate grievance; otherwise the appeal is inadmissible on that point.