Authors:
  • After I give lectures-on almost any subject-I am often asked, "Do you believe in UFOs?" I'm always struck by how the question is phrased, the suggestion that this is a matter of belief and not evidence. I'm almost never asked, "How good is the evidence that UFOs are alien spaceships?"

    Carl Sagan (2011). “The Demon-Haunted World: Science as a Candle in the Dark”, p.82, Ballantine Books