The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt.
     Bertrand Russell (1872-1970)

You can be sincere and still be stupid.
     Charles F. Kettering (1876-1958)

Before mass leaders seize the power to fit reality to their lies, their propaganda is marked by its extreme contempt for facts as such, for in their opinion fact depends entirely on the power of man who can fabricate it.
     Hannah Arendt (1906-1975),
     The Origins of Totalitarianism