Recent research by a team of creation scientists known as the RATE (arth) group has demonstrated the unreliability of radiometric dating techniques.
The textbooks speak of the radiometric dating techniques, and the dates themselves, as factual information.
Plants absorb carbon dioxide from the atmosphere and animals eat plants.
This means all living things have radioactive carbon-14 in them.
The only problem is that we only know the number of daughter atoms now present, and some of those may have been present prior to the start of our clock. The reason for this is that Rb has become distributed unequally through the Earth over time.
We can see how do deal with this if we take a particular case. For example the amount of Rb in mantle rocks is generally low, i.e. The mantle thus has a low If these two independent dates are the same, we say they are concordant.