Which scientist on earth would try to do carbon dating on coal beds? ...
(Hold press-apparently some creationist did. Another attempt at deception, I guess. We know that they don’t do science, anyway, so it’s another very good reason to just laugh at them!)
Yeah, the RATE (Radioisotopes And The Age of the Earth) group. They tested coal and diamond. The amounts they found were "above instrument background" but minuscule. They ignored the fact that 14C can be produced
in situ (although we don't know if it was), and they played fast and loose with the meaning of "background". Bottom line: there's no good reason to believe that any coal or diamonds are young enough for their 14C "dates" to indicate their age.
See
RATE’s Radiocarbon: Intrinsic or Contamination? (published by a Christian organization and written by a Christian, FWIW).
(Dr. Baumgardner tried to defend his results at another discussion board a few years ago. After a day or two of pointed questions he couldn't or wouldn't answer, he disappeared in a puff of Pascal's wager).