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.
In passing, he gestured vaguely at a vague conception of science. I guess that doesn't qualify as an argument, so perhaps there is no argument to steelman. But I think that the vague conception of science he was trying to gesture toward does correspond to a real thing that scientists sometimes do.
In the map-territory analogy, this might correspond to a fuzzy or blank region of the map. A scientifically minded person might well say "One reasonable hypothesis is that the Earth is flat the blank region looks like nearby regions, but until we have tools and techniques that can be used to prove or disprove that hypothesis, it is an open question."
But here's the idea I think the author was trying to gesture at. In my experience, most people are way too eager to try and solve problems they don't fully understand. I've often heard scientists and engineers caution against this, but the most notable quote is from the rocket scientist Wernher Von Braun: "One good test is worth a thousand expert opinions". I've seen people like Bill Nye repeat this, and seen plenty of science-themed reminders that test results are often surprising, since the world is often much more complex that we give it credit for.
As for the historical commentary, I completely agree. The scenario isn't historically plausible. The scientific revolution would have had to happen earlier just to produce someone capable of saying the quote, and society would have had to somehow go through a scientific revolution without noticing that the earth was round.