Kernrechtsfrage
Whether the appeal could challenge the lower court's assessment of evidence on set-off and renovation costs
Extrahierter Entscheid
Those arguments were inadmissible because they attacked the cantonal court's evaluation of evidence rather than a federal-law issue or an obvious factual oversight.
Extrahierte Begründung
On appeal, the Federal Court is bound by the cantonal findings unless an obvious mistake or breach of evidentiary rules is shown; the appellant's complaints merely disputed the appraisal of the file.