Ivan Seeking said:
Or perhaps we will find that variations exist of which we're not yet aware -like discovering dark energy, for example.
I don't see how that's even in the same ballpark. The fact that we don't yet know what dark energy
is doesn't mean that the scientific method is struggling with it.
Perhaps we will drift though a region of space in which something important changes that we don't understand. But as I said, and whether scientists like to talk about it or not, it is an assumption that exists, but it wasn't my point.
There's a distinct difference between a universe that's unpredictable and one with mysteries. Drifting through a region of space with "something" in it does not, in of itself, pose any philosophical quandaries for science.
Einstein worked on the unified theory for the last half of his life. Was he operating outside of the domain of applicability of physics, or was he taking it on faith that such a theory is possible in the first place?
Must everything you do rest on faith that it will work out in your favor? Even if Einstein believed that he could find the final theory, he didn't necessarily have religious faith in the workings of science. Perhaps he did, I'm not familiar enough with the man to speak for him, but I know that I don't and I know that many of my colleagues don't.
And throughout the sixties and seventies the results strongly favored the standard model as the final theory, and this was clearly a frontline discussion. To say this has not been a focus of modern physics seems absurd to me.
I really don't see where you're going with this. Physicists always try to understand more and more about how the universe works, so in a sense, they are always pushing towards the final theory. This fact alone, however, doesn't prove your statement about faith. You seem to be resting on the assumption that nobody is motivated to achieve unless they have religious faith in the outcome.
I have seen a physical working model that was made before Kepler and used to predict the position of Mars at any time, so someone was trying to model the motion of Mars based on observations. Isn't that what scientists do?
Yes. The problem was that the model was
failing. They kept adding epicycles every time Mars deviated from the predicted path. Had they been able to accept the possibility of non-circular motion, this wouldn't have been necessary.
But the original point is that right answers don't necessarily speak to underlying truths, so apparently we agree on the main point.
Yes, I agree with that; in fact, science is not even obligated to address the existence of underlying truth. Some scientists do attempt to address this, but almost entirely in private or through the popular media. You usually won't see such discussion in academic papers.
That is the assumption that I'm talking about. We don't know this to be true but we implicity assume that it is.
My statement was referring only to the current state of things -- we know that our theories aren't the final ones, so the equations must be models. In general, however, I wouldn't say we make any assumptions as to whether or not a particular theory is the most fundamental. You said yourself that there was much discussion about the possibility the Standard Model being the final theory (in the 60s and 70s).