'I know' seems to describe a state of affairs which guarantees what is known, guarantees it as a fact. One always forgets the expression, 'I thought I knew.'
By far the most famous headline error in U.S. history, the “Dewey Defeats Truman” banner appeared in the Chicago Tribune on November 3, 1948 – the day after Harry Truman was reelected president of the United States. The article went on to state that Dewey “won a sweeping victory in the presidential election yesterday,” a claim that dovetailed with nationwide polling suggesting that a Dewey win was “inevitable.” In reality, Truman won the electoral vote by 303 to 189. He was photographed holding a copy of the Tribune at the train station in St. Louis, Missouri, on his way back to the nation’s capital for his second term.