Nevertheless, many scholars believe that copyright exception should be based on a public policy objective and the needs of the public. For example, Peinbothe suggests that the exceptions should be based on a public policy objective, such as public education, public security, etc. Ricketson emphasizes that it is necessary to have a public policy basis to consider an exception a special case. Likewise, SenFitleben states that exception should be based on a specific policy objective such as public to have the exception for educational institutions and libraries. they justify this reasoning on the basis that libraries have an essential role in the dissemination and preservation of knowledge and culture for the public, while educational institution have an important role in providing the public with opportunities for learning and developing their knowledge actively.