An Indian old man claims he is [180 years old] now.
We are not able to tell he is 180 or 181 probably. But can we tell he is 90, 120, 100 or 150?
Different people may age differently.
A 60-year old person may appear to be 80, while somebody else could appear younger than their mathematical age. Some other people may have progeria.
What is the most accurate way to identify a living person's age nowadays? Are there reliable parameters to measure?
C-14 needs a long time base line. Hence, it is suitable for the bone of dead people.
What kind of method can guarantee it can distinguish a 30y and a 80y old person? What's the error bar of that method?