Have you ever stated a fact which you felt was painfully obvious only to have somebody ask what you're talking about or, even worse, dispute the validity of your claim?
These people clearly missed an important day of mental development if they think an obvious fact, like pigs love mud or cereal tastes better with milk, could possibly be disproven after all these years.
How are we supposed to deal with these infuriatingly ignorant people?
By letting members of the scientific community tell them what's what, because even deniers of the obvious can't ignore or dispute facts when they're presented by scientifical types.
So next time somebody argues high heels don't hurt our feet, guys don't stare at boobs or overeating doesn't make you fat, citing something they read on the internet as proof, you'll have the scientific proof to shut them up!