Can we agree to this: Even though any current scientific theories, hypothesis or claims may not 'have standing' in 500 years, that is, no scientific theory, hypothesis or claim can be said to be literally true till the end of time true; yet, our current set of scientific theories, hypothesis and claims should be treated as true.
Not quite (since we are getting bogged down in the meaning of mere words & language ... as always when philosophy gets into the discussion) - we do not know that "no scientific theory, hypothesis or claim can be
said to be literally true till the end of time
true;" ... we don't know if that's true or not, perhaps some current theories may continue to be regarded as true for as long as human people survive. But as I've said before (at least a dozen times) – scientists do not need to (and few ever do) waste their time & public money indulging philosophers in their wish to argue indefinitely about such things.
Should "our current set of scientific theories, hypothesis and claims be treated as true" ... answer is - not really, not unless you wish to do that (nobody is stopping you) ... but the actual answer is that we, & science, do not need to debate whether such theories should be treated as "true" (that means proven certainty) ... all we need to do is to show that the explanations from science appear to be accurate to a very high degree, and that is enough to proceed with that as our best & most useful way to make progress and achieve things for the benefit of all mankind. That's a very big task and a huge ambition, but so far science has successfully achieved all of that & a great deal more.
For example, the question, 'Is there a scientifivally demonstrated procedure to greatly redu ce the probabilities of dying from colon cancer?'
The answer is YES - and, ignore that advice at your peril.
Common table salt can be described as NaCl . . . will there be a far better and useful description of the nature of common table salt in the future? Yah probably - this is a good thing !!!
Yes. All that we/science are doing is discovering what appear to be the correct explanations for anything, and showing that they succeed to a very high degree of accuracy (often vastly greater accuracy than is needed for the task), and where those explanations can be shown as repeatable a million times out of a million trials. That's all we ever need to do.
Just because some other subject, such as philosophy, wants to claim that we cannot prove for sure that our answers are certain to be true for ever, and just because it may criticise that as a limit to science (but where it itself (philosophy) has turned out to be infinitely less capable and less useful (almost no use at all … except for creating arguments and carrying them on indefinitely) ), that is not by any means a credible argument for why scientists need to take any notice at all of what philosophy has to say about anything.