If I take a sample and measure an argon to potassium ratio of 0, I know that this sample is 2.4 billion years old.
However, all of these numbers are probabilities, not absolutes.
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And so, by any standard, it was scientifically meaningless for Dr.
Austin to apply Geocron's potassium-argon dating to his sample of dacite known to be only six years old. If there wasn't yet enough argon in the rock to be detectable, and the equipment that was used was not sensitive enough to detect any argon, how was enough argon found that such old results were returned?
The bell curve of probable age starts at about 1.8 billion years, peaks at 2.4 billion, and dips back to the baseline at 3 billion.
So whether you call it an exact science or not is a matter of linguistics.
This has a standard deviation, so it also contributes to the margin of error.