One often hears statements such as eighty percent of the questions can be answered by twenty percent of the answers, or other similar statements, indicating that a small set of answers are enough to answer most of the questions in a particular topical area. To investigate this statement, a set of 630 questions, which were sent to an on-line service, were analyzed. All the questions were about eating disorders and obesity. The conclusion is that the statement, which was investigated, was not true. There was a large variation of different questions, and even though some questions did appear more than once, it was much less than eighty percent of all questions. The chapter offers insight into different types of questions posted on-line in the area of eating disorders. From the study follows that to provide satisfactory answers to a large part of the questions, it is necessary to have humans answering the questions.