And because humans are imperfect, we are never able to make exact precision on anything. This means, that anything we do, we are doing some kind of rounding/estimation at some point. So, this means that 2 + 2 = 5 but only for very large values of 2.
2.44 rounded = 2
4.8 rounded = 5
2.36 + 2.44 = 4.8
2 + 2 = 5 (when all numbers are rounded)
It's also the title to a radiohead song
Paul: Yeah, you go do that you fricken douche.
Luke: Hey Pat, wtf does 2+2 equal again?
"Hail to the Thief borrows equally from each. Its title implies that this will be a collection filled with songs of anger and dissent, but Radiohead no longer howl at the moon like they did on 1995's The Bends. Instead, they use eloquent metaphors and complicated arrangements to express the uncertainty, fear and anger arising from the 2000 U.S. presidential election and a post-9/11 world. There’s no doubt about where Thom Yorke and company stand; the prog-rock break on "2 + 2 = 5" and Yorke's terror at the thought of being "put in a dock" make that immediately clear"
it can be used to express strange things that have happend , and or lack any sence
"yes it was very 2+2=5"