premise: Confidential Information shall not include:  (a) information which can be shown to have been in the public domain at the time of disclosure,  (b) documented information which was possessed prior to the time of its disclosure hereunder,  (c) information that becomes part of the public domain by publication or otherwise not due to any unauthorized act or omission on the part of the parties or party, or  (d) information that is given to the parties without obligation of secrecy by a third party, who is free to disclose the information, as of the date of such third party's disclosure.