I don't change subjects until they are either resolved or can be taken no further.
Continue to rub your nose in it is what it shall be then!
Did you take all the dates as equal or did you pick the one you liked?
Did you note the different methodology for the dates or did you just pick the one you liked?
Did you consider scientifically valid methods of combining the data (as the researchers actually did)?
Why is one number better that what is found in aggregate?