So if science can say a thing exists or is true, what does that mean according to your understanding of science?
Larry, really, come on, this is not difficult to understand. Or rather it would not be, except for the fact that you seem to be sitting behind a vast wall of confirmation bias that you erected long long ago (e.g. 30 years ago!) ...
... science cannot say with 100% certainty whether or not things exist (or that things are "true"). And ultimately, physicists/theoreticians at least, do usually acknowledge that. Are you understanding that so far?
OK, so the next step is - scientists (including physicists & theoreticians) almost always do believe that our observations and explanations are probably true (almost certainly true in the case of established "Theories") ... but they are rarely going to make the mistake of saying that they have literally "proved" things. Are you still with me" Do you understand that?
Next step - although real scientists, e.g. in core physics research, rarely bother to get into an argument with philosophers (or anyone else who dissents from what science is saying, or who tries to argue that science is mistaken/wrong/inadequate for some philosophical type reason that actually boils down to a dispute about what words can be used to argue with) about whether or not what the scientists are detecting and explaining is in fact “real” in the sense of having any actual existence at all. The reason they usually avoid those sort of discussions is because it's simply an egotistical attempt to waste everyones time. Do you get that? Are you understanding what I am telling you?
If we go back to your YouTube film with Sabine Hossenfelder, in the second clip that you posted, what she seemed to be saying was exactly the above, i.e. as far as I could see (at admittedly a quite cursory glance) she was saying that science should not get into that game of trying to claim that we know as a matter of certainty what “reality” actually is … she was saying that if philosophers want to argue about that then science should leave
them to argue about it. Do you get that?
What she was
not saying in the part that I watched, was that philosophy can tell us what is indeed “real” (whilst also claiming that science cannot possibly do that, or claiming that it cannot do it as well as, or better than, philosophers). Do you understand what I am saying to you?
IOW – if you, we, any of us, want to understand what is probably “real” (ie what is “reality”) in this universe, then science has certainly gone a zillion miles beyond what philosophy had ever done to answer such questions. So if you truly want to understand the actual nature & properties of everything (absolutely everything) that any of us can detect or experience in this universe, then science has shown it's credentials to be so far beyond that of traditional historic philosophy that it's not any sort of comparison at all any more … as I said before (slightly flippantly) – the score so far is Science a trillion vastly important discoveries and explanations vs philosophy precisely “Zero”!