The use case is that a user is only required to pass a quiz once, but we would like them to be able to review the course materials (eg, quiz directions) at any point in the future. My thought is to add an additional configuration option that kicks in once a user has surpassed the maximium configured takes for a quiz--the functional change would be to allow forward and backward navigation once they had taken the quiz once (allowing them to browse the quiz contents without actually answering the questions).