T 0278/00 (Naphthyl compounds/ELI LILLY) vom 11.02.2003

1. The reasoning of a decision under appeal must be taken as it stands. The requirements of Rule 68(2) EPC cannot be construed in such a way that in spite of the presence of unintelligible and therefore deficient reasoning, it is up to the Board or the Appellant to speculate as to what might be the intended meaning of it.

2. The Board must be in a position to assess on the basis of the reasoning given in the decision under appeal whether the conclusion drawn by the first instance was justified or not. This requirement is not satisfied when the Board is unable to decide which of the various inconsistent findings indicated in and justifying the decision under appeal is correct and which is false.

3. A decision of the European Patent Office open to appeal which is based on such a deficient reasoning is not 'reasoned' in the sense of Rule 68(2) EPC, which failure amounts to a substantial procedural violation.