premise: The obligation of confidentiality and restriction on use in Section 2 hereof shall not apply to any Confidential Information that the Receiving Party proves: (a) was in the public domain prior to the date of this Agreement or subsequently came into the public domain other than as a result of disclosure by the Receiving Party; (b) was received by the Receiving Party from a third party free of any obligation of confidence of the Receiving Party to such third party; provided that such third party is not known by the Receiving Party, after reasonable diligence, to be bound by a confidentiality agreement with or other obligation of secrecy to the Disclosing Party;