Art. 30(4) of the Federal Judiciary Act; independent fact-finding by the Federal Court where cantonal courts omit assessment of evidence on relevant allegations as immaterial; the denial of a cantonal evidentiary appraisal is to be treated like a refusal to take evidence on legally relevant facts. In such a case, the Federal Court is entitled to determine the evidentiary result itself on the basis of the file, including factual assessment (consid. 1).