Any Evidence For A Historical Jesus?

[Jackalope]

What's wrong with your explanation is that you conveniently fail to mention that the variable rates of C14 production and C14/C12 ratios are well understood, that calibration is done to account for them, and that you have no point.

so they know about the variability of the radiation the earth is exposed to but assume they know how much. how can they know for sure how much the earth was exposed to 5000 years ago? it's not constant change, it's varied.

No kidding, really? Do you think that scientists don't know this?

In all seriousness, the information you are asking for is easy to find with google. Yes, the factors influencing the accuracy of C14 dating are not constant. The link I gave you addresses this, and even tells you some of the ways that the historical rates of C14 production were determined.

Start there and investigate it yourself. I led you to the answer to your question, I'm not going to spoon feed all of it to you.

In addition - by saying that they "assume they know how much", what you're really saying is that YOU assume that they assume they know how much. This isn't the case at all. Let me give you a little advice - and this isn't intended to be derogatory at all (and yes, I do realize I have done so in the past). That you don't understand how something works is OK. It's OK to say you don't know. Knowing that you don't understand something is the first step to gaining understanding. It's pretty clear from your posts that you don't understand carbon dating - and that's OK. I suspect it's just a matter of you trusting the wrong people to tell you the truth about it. There are apologists who's apparent understanding of radiometric dating is stuck in the 1950's, and they're using criticisms of the method that simply are no longer applicable.