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Lately, the accuracy of this technique has been a matter of debate.

It is doubted due to certain perceived flaws in its fundamental assumptions and ambiguous results.

It only means that these need to be used with caution and with a knowledge of the limits of their accuracy.

The accuracy of this method is largely dependent on an assumed absolute ratio of C-14 to C-12, which is supposed to have remained constant over time.

However, in reality the ratio varies with time and place.

Hence, the ages are specified as 3400 BP (3400 years BP). The flaw in this method is that it assumes that the carbon-14/carbon-12 ratio has been the same till 1950, which is not the case in reality.

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One reason is the fact that it has a radioactive isotope and second reason is that life is based on carbon compounds.