If you test one method and it gives a wrong answer, all that does is bring every one of those dating methods into question.
Not necessarily, which is why scientists use different methods of dating. If the date would seem suspect, other methods should not give the same date. At this point corrective measures would be instigated such as searching for contamination.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969