> "Answers" in a common sense are supposed to be "true" and "permanent"

I would argue that answers are supposed to be useful for the purpose motivating the question.

Q: What is the price of gas? A1: The number of units of some other good or service demanded by a seller in echange for a given quantity of it. A2: about $4.00/gal

A1 is, I would say, both "true" and "permanent". Assuming it is at least approximately accurate, though, A2 is much more of an answer in most cases the question is asked, even though it is at perhaps only approximately and in any case at best transitorily true.

In that sense yes, I agree that science gives good answers.