> Hi Ray.
> In your experience, to have over 400 samples say
> the same thing between two tests taken 10yrs
> apart, not to mention other RCD tests done which
> all fall in the same range-how much of this
> matters as a whole to the credibility of these
> tests? Meaning, what is the likelihood of all the
> tests always being wrong the same way no matter
> who is doing it or when?
Your question requires many answers, there seems to be no simple answer. For a roller coaster ride through the problems of C14 dating check out c14dating.com
Although not directly connected with the pyramid age, but possibly so, here is an example of all tests being wrong
The Cycle of Cosmic Catastrophes
For example, dates from the Paleo-Indian sites at Leavitt and Gainey, in Michigan, came from features such as fire pits, or hearths, that scientists knew were 13,000 years old; and yet the radiocarbon date came back suggesting that, inexplicably, the long-vanished Ice Age Indians were still hunting extinct camels when the Egyptian pharaohs were building the Temple of Karnak 2,800 years ago.
Yes, all tests can be wrong, and all tests on items from about 13,000-11,000 BP will be wrong. About 10,000 years wrong if I'm not mistaken.
> Is there something that could be done, or wasn't
> done, to these samples that would make them
> 20,000yrs old instead of 5,000?
There are problems called "plateaus" and "wiggles" which will cause the test results to be off by thousands of years. So far they have identified plateaus at 18,000 BP and 13,000 BP and others. If the samples taken were really from 13,000-11,000 BP they would have to adjust for that plateau, which they probably wouldn't do because that time period is unthinkable.
IMO weighing the tests against "known" Egyptian dates makes it very biased, could that bias allow for error?