Eclipsed, or at least equalled "So say we all!" in terms of automatic nerd call-and-response yet?
Just a random thought, as someone I know posted "For the night is dark and full of terrors" on her Facebook wall, and, without a second thought, I responded "FOR THE NIGHT IS DARK AND FULL OF TERRORS!"
And while we're at it, where does "It is known" fit into the hierarchy? Is it a category apart due to its tone? I mean, that hardly matters in text when it's a question of whether or not you turn on Caps Lock, but I can't imagine getting your whole audience at a presentation to shout out "IT IS KNOWN!", like the guy who ended a career presentation at my college with "SO SAY WE ALL!" a few years back.