Errors may exist in prior-art documents.
When a potential error is detected, three situations may arise depending on whether the skilled person, using general knowledge,
When assessing the relevance of a document to patentability,
in case (i), the disclosure is considered to contain the correction;
in case (ii), the disclosure of the passage containing the error is not taken into account;
in case (iii), the disclosure is taken into account as is.