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Carbon-14 for example is considered accurate by its supporters on ages from 2 to 50 thousand years.

Modern methods can detect essentially any Carbon-14, and therefore produce dates up to about 100,000 years.

Given this confirmation of the confounding factor, the line of observations may be extended until it intersects the curve consisting of the possible values without loss of lead. A variation of this method is also known as lead-lead dating.

It does not determine the age of a single sample directly, but the time at which different samples (with differing amount of uranium and lead) were separated from a common pool.

Radioactive dating is the procedure of calculating an age for an artifact by determining how much of the radioactive material has decayed and calculating how long that would take given the half-life (how long it takes for half the material to decay) of the material being tested.

We can calculate the age of the hole by subtracting (b) from (a) to find out how much water has left the tank, and then dividing this by (c), the rate at which it is leaking out.

The procedure, however, is difficult, and many tests have shown that it can be inaccurate, and it is at times not even considered reliable by mainstream scientists.

It is impossible to measure the age of something, except to time it as it actually occurs, so radioactive dating methods calculate the age, based on (i) measurements of quantities of specified materials, (ii) measurements of decay rates, and (iii) assumptions about the history of the sample.

That result is compared to decay curves to get a time interval.

That time interval is compared to calibration information and corrections made for known variations.

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