Thanks Christy. Thatās useful. Itās enough for me to give a response.
@adamjedgar I shall assume that Joelās summary of the video is accurate; if it is not, it is up to you to tell me what he is misreporting. This being the case, the video brings nothing to the table that I havenāt already seen, but just repeats the same old shenanigans that YECs have been parroting for years.
Iād just like you to understand something here, Adam. A few years ago, I spent an extensive amount of time reviewing young earth claims. I started up a blog with a summary of my findings, and you can find it here:
In my review, I was asking the following questions.
- Are YECs reporting the evidence and scientific methodologies accurately? Do scientists really make the assumptions that YECs claim that they make? Does the evidence actually consist of what they claim it consists of?
- Are YECs interpreting the evidence honestly? In particular, is their approach to measurement accurate and honest, as Deuteronomy 25:13-16 and other Bible verses demand? Are they applying the same standards of rigour and quality control in their experiments as other scientists do? Are they reporting their findings accurately? Are their claims proportionate or are they downplaying things and/or blowing things out of all proportion?
These are questions that can be answered using objective, measurable criteria, Adam. Science has rules, and the rules are the same for everyone, whether you are a Christian or an atheist or an aardvark. If you want to interpret science according to Scripture, you must do so within the constraints of the rules, because disregarding the rules is not interpreting science according to anything; it is scientific fraud, which is a form of lying, which is something that the Bible condemns in the strongest possible terms over and over and over again.
So basically, my question was whether YECs were sticking to the rules. In every case that I studied, the answer to these questions was a resounding NO.
Iāll just touch on one of the subjects that Joel mentions that the video covers: radiometric dating.
Just how unreliable is radiometric dating?
In order to claim that the earth is six thousand years old, it is not sufficient to just show that radiometric dating is āunreliableā or that it makes āassumptions.ā You must show that it is sufficiently out of whack that it consistently fails to distinguish between thousands and billions across all the different methods that are used; you must show that the assumptions that it does make could have been violated in ways that are consistent with the results that it does give (and you must make sure that it actually does make the assumptions that you are claiming that it makes in the first place); and you must account for any successful testable predictions that it makes.
YECs sometimes point to results such as Mount St Helens dacite samples from the 1980 eruption giving ages of up to two million years. This indicates that the error in the method concerned (K-Ar if I recall correctly) can be up to two million years and nothing more. This may sound a lot but the oldest samples on earth that have been dated radiometrically (by a completely different method ā U-Pb dating of zircon crystals) are over four billion years old ā two thousand times as much. To cite an error of just two million as justification for throwing out results two thousand times as much as that is like taking a set of bathroom scales that read 3kg when youāre not standing on them and then, when you stand on a completely different set of scales and see a reading of 93kg, claiming that you weigh nothing.
The reliability of radiometric dating can be established in two different ways that donāt require you to have been there to see things happen from the outset: cross-checks between different methods, and making testable predictions. One example of cross-checks comes from places such as the Hawaiian islands. Radiometric ages increase linearly with distance from the main hotspot under the Big Island, and this can be used to calculate the rate of continental drift for the past 80 million years or so. The result matches very closely with direct high-precision measurements taken over the past few decades by GPS satellites.
YECs sometimes try to argue that this only happens because āboth methods make the same assumption of uniform rates,ā but that is simply not true. Both methods make different assumptions of uniform rates, and to get the same results in a 6,000 year old earth, two independent assumptions ā radioactive decay rates and continental drift ā would have to have been violated in complete lock-step with each other by a factor of many millions. Such a possibility is science fiction.
The other way that the reliability of radiometric dating can be established is through testable predictions. Here, we have another example: oil exploration. Petroleum geologists have to know both the ages of the oil deposits and their thermal history in order to determine what state the oil is in. Too young, or too cold, and it wonāt have started decomposing yet. Too old, or too hot, and it will have evaporated away to nothing. They have to make these predictions before they can start drilling, because setting up an oil rig costs hundreds of millions of dollars, especially for offshore drilling (e.g. in the North Sea or the Gulf of Mexico). Conventional old-earth geology has proven to be very successful in finding oil this way. YECs donāt even have a model that even lets them get started.
YECs sometimes claim that oil exploration doesnāt use absolute ages of oil deposits. This is a flat-out lie. While there are some older techniques that could once have found oil without using radiometric dating, the deposits that could be found that way were all exhausted decades ago. In fact, here is a research paper that describes an oil deposit that was found using more modern techniques involving radiometric dating in a place that the older, age-agnostic techniques had predicted there wouldnāt be any:
(See also this discussion.)
In summary: while YECs may have established that some radiometric techniques give flaky results in some circumstances, they have fallen far, far, far, far short of establishing that all radiometric results are so consistently out of whack that none of them can distinguish between thousands and billions. Radiometric dating has confirmed far beyond all reasonable doubt that the earth is far, far older than six thousand years, and to claim otherwise is simply not honest.