Some elaboration/clarification/wrapping up may be called for here .. I'll use the word 'truth' here, as far as it can be legitimately applied in science .. as an aid to clarfying the scientific perspective.
Typically I see many people, (note: not necessarily those in this thread), thinking that what science wants to say is something like:
"If theory X is true then outcome Y is true. The outcome Y is true. Therefore theory X is true".
That's actually a completely backward description of how science works. Science never needs to say "assume theory X is true", or "if theory X is true," those word formations have no use at all in science. This is because the whole reason we might say a theory is true, or not true, is because we have already verified the outcome Y.
It's crucial to understand that this is all a scientist can mean when they refer to the 'truth' or 'not-truth' of any theory.
It's a complete misunderstanding that science is a logical process that starts by assuming its theories are 'true'. That's how logic works, but logic never does anything but find the tautological equivalences of its predicates and postulates. Science isn't like that at all!
What a scientist might say, may be similar to:
"I have no idea whether to regard theory X as true, but it predicts Y, so we'll see if Y is true. If it is, we'll say theory X has some usefulness. Going further, we may also say that with enough different Y we will start to regard theory X as true contextually and provisionally".
See how extremely different that is from saying "science wants to say that if theory X is true, then outcome Y will be true"? In science, the only thing theory X ever does is organize, unify, and convey understanding in relation to a set of observations, Y. Then we take theory X and extend it to observation Y' that has not happened yet, but that we regard as sufficiently similar to the existing set of Y that theory X is used to understand, that we expect to understand Y' the same way.
We don't know until we try, but that is how science builds expectations. At no point is it ever necessary to say "if theory X is true", because the truth of theory X is already established by the existing set of Y ... there's no "if" involved, it's an inference not an assumption.
We never assume we'll get, for example, the gold in say, a gold prospecting exercise using science, and we never assume, (for eg), the electron definition is a good one, we test these things. And on the basis of these tests, we build expectations, and we live and die, (literally sometimes .. as in the above 'cliff' test), by those expectations ... because science is the worst way to form objective expectations except for every other way to do it.
The 'word meaning' sub-topic outlined above, can be objectively tested, (via a properly formed hypothesis), and produces its own objective evidence. The assumed existence of some 'truth' completely independent from human language meanings however, is provisionally untestable and can be treated as being nothing more than a belief, which science then handles with indifference (meaning it has zero impact).