Likewise, Senftleben states that exception should be based on a specific policy objective such as public education. Burrell and Colemen give an example of the need for the 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 institutions and an important role in providing the public whit opportunities for learning and developing their knowledge actively.