When a woman hides her year of birth on facebook in an attempt to conceal true age, and one must use life events such as graduation photos to gain an approximate age. Similar to the archeological use of Radiocarbon Dating to estimate the age of an artifact by the half-life decay of it's surroundings.
She told me she was 24 but after Facebook carbon dating her photos it turned out she graduated high school last year.
by GQDK December 5, 2014