At the heart of science is an essential tension between two seeminglycontradictory attitudes ― an openness to new ideas, no matter how bizarreor counterintuitive they may be, and the most ruthless skeptical scrutinyof all ideas, old and new. This is how deep truths are winnowed from deepnonsense. Of course, scientists make mistakes in trying to understand theworld, but there is a built-in error-correcting mechanism: The collectiveenterprise of creative thinking and skeptical thinking together keeps thefield on track. ― Carl Sagan, "The Fine Art of Baloney Detection," Parade, February 1, 1987