tyronem wrote:
I do not agree that that would be deceptive to say that they do not agree with each other.
tyronem, thanks for the clear and honest post. I see that you directly answered my question, never attacked me as a person, and clearly explained your position, without distortion, red herrings or so on.
We disagree over whether saying that the two results "disagree with each other" is a good way to characterize the situation. It seems that this is a good hypothetical example to use because it has clarified our difference in view. So, getting back to it:
Accurate is all metrics for that particular measurement being exact otherwise how do you know which one you can trust if any?
It may seem like that to someone unfamiliar with science, but in science it is well known (even expected) that all measurements have error bars, and that they are not exact at all. Almost all "exact" values are actually those defined that way, quite the opposite of measurements. By "exact", I suspect you actually mean "small error bars". Measurements with acceptably small error bars can be trusted - do we agree on that?
Evolution and the dating used within the evolutionary presupposition framework are the only places anywhere that when things are measured different they are assumed to be the same.
First of all, there are no presuppositions about the expected age - the measurement gives the age, and results aren't thrown out if they give an unexpected age. The only presuppositions are things like assuming that physical processes acted in the past like they act today - an assumption that is not only required for any science to be done, but one which you, tyronem, use yourself on a day to day basis. The dates are assumed to be consistent with each other, which is very different from saying they disagree. Saying they disagree would be the proper thing to say only if the ranges were significantly far from overlapping.
What you may be driving at is that this level of allowed error (this size of the error bars) is not tolerated anywhere else besides evolution and dating. If so, I have to disagree. Even taking your "12 million" number, (which is not the right way to see this error, but I'm willing to use it for this discussion anyway), a 12 million ( = +/- 6 million) is something we all, including scientists often tolerate.
+/- 6 out of 345 is a +/- 1.7% error. We tolerate +/- 1.7% all the time. For instance, that's +/- 1 minute on a clock (how many of our household clocks are off by a minute or more? I'd say most of mine, how about yours?). I had my biometric measurements taken by my doctor last week, and the blood pressure error bars are more than +/- 1.7% (you can see this by watching them take the measurement from the dial). 1.7 % is about two pounds for me, and by not asking me to remove shoes, and so on, my weight was off by well over 1.7%. At 30 mph, 1.7% is only 0.5 mph, and my spedometer reading varies by more than that just from moving my head, and so on. We routinely trust things that are off by +/- 1.7% including in science.
And that date, 345 million years ago, is easily sufficient for science in the example given. Seeing that a fish lived at that time tells the biologist plenty - such as whether or not it could be ancestral to something with an age of 320 million years ago, etc. Similarly a modern rabbit found at 345 million years ago would be the find of the century, even if the date were only known at a precision of +/- 1.7%.
Make sense?
Papias