premise: This Clause [3] imposes no obligations upon the Recipient with respect to Confidential Information which: (a) is known to the Recipient before disclosure by [or on behalf of] the Discloser, and is not subject to any obligation of confidentiality; (b) is or becomes publicly known through no act or default on the part of the Recipient; or [(c) is obtained by the Recipient from a third party in circumstances where the Recipient has no reason to believe that there has been a breach of a duty of confidence.]