"You can fool some of the people all of the time, and all of the people some of the time, but you can not fool all of the people all of the time."
Abraham Lincoln
People hold a painting with an image of slain Shiite cleric Mohammed Sadiq al-Sadr with Arabic sign for "No" with Britain, Israel and the United States depicted as dogs during prayer in Baghdad's Shiite enclave of Sadr City Friday Dec. 17, 2004.
"We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns â the ones we don't know we don't know."