Questione giuridica chiave
Whether the federal appeal against the incidental ruling was admissible without irreparable harm
Decisione estratta
The appeal was not admissible because the challenged decision was incidental and the appellant failed to show irreparable legal harm.
Motivazione estratta
The late-answer preclusion did not finally decide the case. Its effects were comparable to a refusal of evidence, and the Canton could challenge any adverse final judgment later, including the legality of the preclusion. Mere delay and litigation costs were not irreparable harm.