We can agree that the earth is not flat, but I don't think this is really the issue. The article mentions the question whether the Japanese internement is treat

We can agree that the earth is not flat, but I don't think this is really the issue. The article mentions the question whether the Japanese internement is treated in single sentence, or on multiple pages with pictures, personal accounts etc. Stating it is "a fact" does not really help you decide which approach is appropriate for an US history textbook. Yeah we can agree that textbooks should not make objectively false statements, but that is not really the difficult part.