For this reason, I will have to bite the bullet and accept that it is reasonable to assume the decay rate is constant (even though I give this assumption, this doesn’t mean the decay rate is constant.
Rather I am conceding due to no current evidence for the contrary).
Instead, it can only give up to approximately 50,000 years. Unfortunately, dating methods such as the carbon dating method have only been around for a short period of time.
Assumptions While this dating method sounds pretty good and simple enough to understand, there are some assumptions that aren’t often pointed out. So far, no known environmental factors have been able to significantly cause the decay rates to vary.
But, as C-14 continuously decays, it is also continuously being replaced by new C-14 being formed.
How carbon-14 enters an organism Most C-14 will combine with oxygen to produce radioactive carbon dioxide (C-14 O-2).
For this reason, it is simply impossible for carbon dating to give dates as old as millions of years. Closed systems, void of any contamination and without loss of the parent element (C-14) or daughter element. Known amounts of parent and daughter elements present from the beginning. If the decay rate of C-14 were not always constant, then this would be devastating to the technique's credibility.
Even humans contain C-14 because, of course, we also eat either animals or plants (I don’t know what else there is to eat).
Throughout an organism’s life, it is constantly balancing its C-14 decay with intake so that it will always contain C-14.
A correct date is not possible unless there was neither the addition nor loss of parent or daughter isotopes.” This assumption is not one that I am willing to concede on.
In order for carbon dating to work (and this applies to other dating methods as well), the parent and daughter concentrations must have not been altered throughout the specimen’s history.
C-14 is formed in the earth’s upper atmosphere as a consequence of cosmic radiation bombardment.