Thank you for your interjection, Prof. I feel overwhelmed sometimes at the popular and non-confentational view that everybody truth is true for them. I disagree with that but fear to state it because to believe that there is any form of absolute truth out there is all too often deemed closed minded. I think its important to remember that truth is unchanging, but our concept of what the truth was at that given moment will change as we learn new aspects of that moment.