It is generally accepted that radiometric dating is reasonably accurate and the accuracy can be improved by using different elements half-life on the same sample. It is also generally accepted that radiocarbon dating in particular can be calibrated using dendrochronology, which provides a more accurate age. However, both methods has one fundamental assumption that radio active decay rate is always a constant which is not true.

Based on direct verifiable pedigrees and their mtDNA mutation rates, the true mtEve age should be between 6000 – 25000 years before present.