premise: 2. Notwithstanding the foregoing, the obligation of a person to protect the confidentiality of any information or materials shall terminate as to any information or materials which:  (i) are, or become, public knowledge through no act or failure to act of such person;  (ii) are publicly disclosed by the proprietor thereof;  (iii) are lawfully obtained without obligations of confidentiality by such person from a third party after reasonable inquiry regarding the authority of such third party to possess and divulge the same;  (iv) are independently developed by such person from sources or through persons that such person can demonstrate had no access to Confidential Information; or 