Wally Pots Special

Extraordinary Claims Require Extraordinary Evidence


The late Carl Sagan, writing in Broca’s Brain, summarized in an aphorism an Enlightenment Era principle: “Extraordinary claims require extraordinary evidence.” Sagan was writing about claims of paranormal activity, but the principle is at the heart of scientific skepticism. The President of the United States has made an extraordinary claim: that his predecessor, President Barack Obama,…