In times of political turmoil and rhetorical strife, commentators sometimes wheel out this old "quote" by the French philosopher and Enlightenment writer, Voltaire: "I disapprove of what you say, but I will defend to the death your right to say it." They do this in an attempt to calm things down, but also to support the principle of freedom of speech. Voltaire was indeed a champion of free speech and free-flowing political discourse. But did he actually write or say: "I disapprove of what you say, but I will defend to the death your right to say it"? Or is this another example of biographers and later scribes putting words in a great thinker's mouth?