premise: This Agreement imposes no obligation upon the Recipient with respect to the City’s Confidential Material received hereunder that (a) the Recipient can promptly demonstrate with documentary evidence was already legitimately known to the Recipient without a duty of confidentiality prior to the disclosure thereof by the City, (b) is lawfully received by the Recipient from a third party, other than a supplier introduced to the Recipient by the City, without a duty of confidentiality,