premise: The obligations of confidentiality and non-use shall not apply to Confidential Information which the receiving party can document:  (a) at the time of disclosure was generally known to the public or, after such disclosure, became generally known to the public other than by a breach of this Agreement by the receiving party;  (b) was already in the possession of the receiving party at the time of such disclosure without an obligation of confidentiality;  (c) was later received on a non-confidential basis by the receiving party from a third party having the right to impart such Confidential Information; or  (d) is developed by an employee of the receiving party who did not have access to the Confidential Information. 