The thesis of my so-called argument is that I'm skeptical (that itself is rather irrefutable, but I did list reasons for my skepticism); I've yet to see comprehensive analysis of the census accuracy, and until I do, I'll continue to treat any conclusions drawn from the census with skepticism
What do you mean by "secure?" I said I'm skeptical that it was accurate. And willing to change my mind, if you've got a link to comprehensive analysis showing that it's accurate and didn't, say, systematically undercount undocumented immigrants.