Notice the operative word claim. This is in contradiction to your phrase "Here is what we know for sure."
Actually, Mr. Holmes is stating that we know for sure that this person is making this claim. This is not an internal contradiction.
As to further testing involving this individual, according to a BBC news article I have read, he has only allowed himself to undergo this type of scrutiny on this one occasion and that, as mentioned, only for a 10 day period. I would have been much more impressed if he had allowed himself to be observed for a couple of months or so. Afterall, what's a couple of months out of 66 years?
[This message has been edited by Amlodhi, 11-30-2003]