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Anyone questioning the accuracy of radiometric methods is obliged to explain why the cross-checks to sediments, coral growth, tree rings, and other isotope pairs all have the same errors.

To take this into account, a calibration curve is developed using other dating methods to establish the C14 levels over time.Argon/argon dating works using only the ratio of the concentration of the argon isotopes. For the purposes of this debate, "accurate" means that 95% of the dating errors are within 10% of the measured date, within the time span for which the isotope pair is utilized.Since carbon dating depends upon variable cosmic ray intensity, a calibration curve is assumed to be applied to account for that.Age estimates can be cross-tested by using different isotope pairs.Results from different techniques, often measured in rival labs, continually confirm each other.There are about two dozen decay pairs used for dating.