Kernrechtsfrage
Whether the appellant's counterclaims based on an alleged joint venture had to be upheld.
Extrahierter Entscheid
The appellant did not establish any joint venture or co-development relationship; his submissions were largely inadmissible and appellatorily framed.
Extrahierte Begründung
The Federal Court held that the cantonal court did not merely find proof lacking, but considered the contrary facts established. Art. 8 ZGB did not help the appellant because the issue was evidentiary assessment, not burden of proof. The complaint did not meet the required substantiation standards.