Another type of question that can produce inaccurate results are "Double-Negative Questions." These are more often the result of human error, rather than intentional manipulation. One such example is a survey done in 1992 by the Roper Organization, concerning the Holocaust. The question read "Does it seem possible or impossible to you that the Nazi extermination of the Jews never happened?" The confusing wording of this question led to inaccurate results which indicated that 22 percent of respondents believed it seemed possible the Holocaust might not have ever happened. When the question was reworded, significantly fewer respondents (only 1 percent) expressed that same sentiment.