Carl Sagan: The Spokesmodel For The Scientific MethodCarl Sagan is sometimes credited with coining the term. He certainly deserves the credit for putting it on television and making it part of the American conversation about religion, aliens, Resurrections, Nostradamus, elves, and so on.
“Extraordinary claims require extraordinary evidence,” saith the prophet. ECREE, for short, in Internet debate.
Briefly, the idea here is that the way we sort out what is “real” and “true” is by experience. Our experience (codified formally by science, but also privately in each human brain) arranges the world so that we know what is possible and probable and unlikely and impossible based on experience.
It is surely the case that we can make mistakes in determining the likelihood of a truth-claim.
But in the human community, there are things that we agree upon: the habits of gravity and the properties of hydrogen, for instance, and the inadvisability of putting your cat in the microwave.
When someone makes a truth-claim that’s out of the ordinary, naturally, you can adapt it without critical comment. The farther outside of the fields of what seems possible a thing is, the more difficult it is to reprogram our mental conceptions of the world.
A man who lives forever, or Fairy Giraffes With Butterly Wings, might well exist. But it would take a considerable readjustment of what we mean by “reality” and “normal.” And to adapt belief in such a thing represents therefore a tremendous intellectual commitment.
The concept has tremendous importance for Christian apologetics as well as other attempts to persuade people of things that leave slender or no traces in the material world.