Monk, it looks to me like you and Ned are saying the same thing, except that you disagree on the meaning of 'supercede.'
You claim that Newtonian physics is used a great deal in various sciences. It is. Ned agrees, as far as I can tell. Newtonian physics is used because, as it seems Ned argues, the math is much simpler and the answers are so close that it doesn't matter that there is a small error. Good so far?
Still, were our instruments sensitive enough to detect it and our computers fast enough to do the math, Newtonian physics would always lose to GR. Do you deny that?
If so, you stand opposed to the general concensus of modern physics. Even those using Newton's formulas will tell you that were more accuracy required they'd have to used Einstein's math.
If not, how is it that you can argue that a theory which always gives a less accurate answer has the same footing as a theory that always gives a more accurate answer?
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