This is the fourth of Tim Urban's series on Elon Musk, and this time it's about some reasoning processes that are made explicit, which LW readers should find very familiar. It's a potentially useful explicit model of how to make decisions for yourself.
http://waitbutwhy.com/2015/11/the-cook-and-the-chef-musks-secret-sauce.html
The act of steelmanning means to argue against a different position then the one the person is holding. It very worthwhile to criticize people for holding positions for the wrong reasons.
To me what you are saying doesn't seem like a description of the map-territory distinction. A map is not an extrapolation of the territory but an abstraction of it.
That sentence doesn't look to me like it's inspired by looking at what scientists do. I'm not aware of a scientific community having the standard of question being closed when they are over a confidence interval of 0.99.
You might argue that scientists should do things that way, but that doesn't have much to do with the question of how scientists act in the real world.
Statements about what's useful are different than statements that describe what scientists do in reality.
I think you missed a point. At 300 BCE they were not centrally concerned with proving via experiment that the earths is round. They instead cared about things making sense intuitively. The idea that it's important to prove claims via experiment came with Descartes into the scientific mosaic which happened much later.
Nobody at the time between 600 BCE and 300 BCE said: “The part of the Earth that I can see at any given time appears to be flat, which would be the case when looking at a small piece of many differently shaped objects up close, so I don’t have enough information to know what the shape of the Earth is. One reasonable hypothesis is that the Earth is flat, but until we have tools and techniques that can be used to prove or disprove that hypothesis, it is an open question.”
"How does action at a distance work?" wasn't an open question shortly after Descartes. It became again an open question when Newton was shown to be right by the expedition that measured the shape of the earth.
In biology the central dogma of molecular biology was considered a close question for a long time. Biologists where confident about the fact that a lot of the DNA is junk DNA that doesn't do anything.
One of the main reasons why we don't consider the question of whether homeopathy works an open question isn't just that we lack empiric evidence for it working but that we based on our theories of chemistry we don't believe that it could work.
Whether or not chiropratics interventions work was a question that scientists considered not to be open for a long time.
I think you're right that the OP's characterization of science is naive (though I think the everything-is-open idea is always there as an ideal, and I think that really matters), but all your examples here seem really dubious.
Then how did it come about that Eratosthenes proved via experiment that the earth is round and estimated its radius? (A little later than 300 BCE, I think, but in the right ballpark.)
The idea that observation trumps theory was not unknown to the ancient Greeks.
Newton's work was recognized as first-rank science from the beginning, so the idea of action at a distance was taken seriously (at least) from the publication of the Principia. I don't know what expedition you are thinking of, but I am pretty sure it's nowhere near the truth to say that action at a distance was thought to be rubbish until an expedition measured the shape of the earth and thereby proved that Newton was right after all.
[EDITED to add: OK, so I guess you mean the French Geodesic Mission of 1735, which found that the earth is bulgy in the middle (as Newton said it should be) rather than elongated towards the poles (as Descartes claimed, on the basis of what we would now regard as a crackpot theory of vortices). That's hardly conclusive evidence for action at a distance, nor would the opposite result have been anything like conclusive the other way. But, anyway, a large part of the point of that expedition was that "Newton or Descartes?" was an open question. It would be nearer the truth to say that the expedition closed the question. But not much nearer, because as I say the question the survey resolved was not the question of action at a distance.]
The central dogma, at least as Crick stated it, says that the transcription from nucleotide sequence to amino acid sequence never goes the other way, with proteins getting decoded back into nucleic acids. So far as I know, this is still a closed question. Was it ever thought absolutely certain that there's no mechanism by which proteins can affect the information in nucleic acids?
They still are, and so far as I know they never claimed that all non-coding DNA is completely functionless. The "biologists thought most DNA was pure junk but now they've been stunned to find that some of it is useful" narrative is, I think, mostly hype.