Mark Twain? Josh Billings? Artemus Ward? Kin Hubbard? Will Rogers? Edwin Howard Armstrong? Anonymous? Question for Quote Investigator: The Oscar-winning 2015 film “The Big Short” begins with a display of the following statement: It ain’t what you don’t know that gets you into trouble. It’s what you know for sure that just ain’t so. The … Continue reading Quote Origin: It Ain’t What You Don’t Know That Gets You Into Trouble. It’s What You Know for Sure That Just Ain’t So