"When we do a very elementary mathematical test, we have discovered that all of the elements of the two bodies _ the two people, the two sitters _ are in exactly the same place," Feldman told The Associated Press by phone. "It strikes us that in order for that to be so accurate, so meticulously exact, only the person who did one did the other ... It's an extraordinary revelation in itself, and we think it's valid."
"So far, not one scientific test has been able to disprove that the painting is by Leonardo," said art historian Stanley Feldman, a foundation member and principal author of a foundation book entitled "Mona Lisa: Leonardo's Earlier Version" to be released Thursday. "We have used methods that were not available to Leonardo 500 years ago."