Question juridique clé
Whether Art. 8 CC was violated by accepting the contractor's claim without pericial proof
Solution extraite
No. Art. 8 CC does not determine the assessment of evidence or require a specific type of proof; the cantonal court could rely on the client's pre-litigation and litigation conduct.
Motifs extraits
The lower court did not decide in the absence of evidence, but on the basis of an evidentiary assessment under cantonal procedure and good faith; direct or indirect proof, including conduct, may suffice.