What I mean is that certain methodological approaches are heavily disfavored. Slightly longer version of my point here.
Edit: And who is moving the goalposts now? You said "position X" is not trivially wrong. I said, "Here's an example of Konkvistador articulating position X."
Since history is so often employed for political purposes ("It is a principle that shines impartially on the just and unjust that once you have a point of view, all history will back you up"), it's not surprising we don't discuss it much. If, even with this disfavoring, people still think posts like http://lesswrong.com/lw/cuk/progress/ are worth posting and inspiring pseudohistory like this - then this is not a disfavoring I can disfavor.
Not that excluding one area is much evidence of insularity. If one declares one will eat only non-apples, is one an insular and picky eater?
If it's worth saying, but not worth its own post, even in Discussion, it goes here.