Shortcomings of a dating method in current use are not generally acknowledged by evolutionists.
Only when they feel they have devised a better method for a specific time period, do they publicly admit the weaknesses of the method they had been using previously.
These admissions have profound implications for human evolution.
However, these alternative methods have serious problems of their own.
Of the 84 anatomically modern Homo sapiens fossil individuals dated by evolutionists beyond 40,000 years, 59 of them (70%) fall into this 40,000-to-200,000 ya gap.
Because bone is porous, it is subject to ground-water leaching.
Hence, the method fell into disfavor because it gave questionable dates.
It is impossible to give an evolutionary sequence to the human fossils because there is a coverage gap involving the dating methods which evolutionists believe are the most reliable—radiocarbon and potassium-argon (K-Ar).