However, human beings love to see factual precision, and we want to know how old something is.
Please remember that all dating methods, even those termed "absolute," are subject to margins of error. That is a very small amount of possible error range. Modern studies almost always use two or more methods to confirm dating work and to build confidence in the results obtained.
Rubidium-Strontium and Uranium-Lead also has problems of the same kind.
Potassium, Rubidium and Uranium salts are highly soluble.
James Hutton and William Smith advanced the concept of geologic time and strengthened the belief in an ancient world.That is where the sample of interest is tested along with several others of the same rock type, but from different areas. Walt Brown’s book on-line at The Center for Scientific Creation.On page 64 of his book he describes the double blind test needed to establish credibility for radiometric dating.We believe that since evolutionists expect certain rocks to yield dates that agree with their theory, no laboratory will publish dates that are wildly out of whack, or they wouldn’t get paid for producing a result that would be hotly contested as experimental error.Woodmorappe shows that even the published results are enough to render the method as unreliable.