Official Government data are on the public record and can be used by officials to contradict or discredit the institution’s own data, so care should be taken. To show balance, it may be prudent to give both sets of data, unless there are compelling reasons for believing that one set is more reliable than the other, such as a third set of data or the report of an independent expert. Some explanation of why one set of data is more authoritative is better than ignoring one set over another.