In a sense, this is true. Science works equally as well if the past was constant as if it changed.
Right, but it only works here, in this state, and can't tell if the state is the same or not.
However, a changing past has consequences, and measurable ones at that. It would, in short, be detectable. We have tried to detect deviations from constancy in natural law, and find no significant change for 13.7 billion years.
We are the change from the other state, and we detect it. In fact, that is ALL we can detect, as it is all science ever knew.
You still dance around this issue. You still assume your absurd notion that an assumption of a constant past necessarily leads to a conclusion of a constant past. This is false.
True, I don't make that assumption, can't blame me there, you are the one that said it! I assume a past and future along the lines as God speaks of them in the bible. That would be different, not 'constant'.
The way our theories are built up, an assumption of a constant past, were it incorrect, would be immediately obvious in our experiments.
False, and if you give an example, we might see precisely why.
For one, the radiometric dates of different isotopes from the same rocks that have been isolated since formation would not line up.
They have a certain relationship to each other, in this state, and they likely also had a different relationship to each other, in the different state. Either way, we still get a line up. It just doesn't line up for the mythical reasons you have assumed.
So why is it that radiometric dates of different isotopes agree?
They don't, there are no dates, there is a relationship of materials. They are now in a decay state, so they agree with that, of course, just as they will agree with another reality in a different heavens and earth in the future, where it will never pass away.
Why is it that I can take the isotope ratios from isotopes with very different decay rates, and still end up with the same age?
Because the relationship now is decay related.
Why is it that that age so often appears to be much, much older than a few thousand years?
Because you look at it through the looking glass of a same state myth. How else could it look? Having a lot of a certain material, that now happens to be in a slow state of decay is not related to great time. It is related to the present state of the universe, and matter, and laws, and how the materials we were left with at the state change now react, and behave, and relate to each other. Meaningless, to the future, or to a past, unless the universe is the same. Utterly. Absolutely. Your great problem is that your present science cannot address the issue even, except by assuming, believing, supposing, what iffing, guessing, and making stuff up!
Isn't it time you admitted what has went on, and bailed out from that narrow minded, zealous, godless belief system, dressed as science??