A Quote by Carl Sagan

For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea. The extraordinary claims are not supported by extraordinary evidence.
What counts is not what sounds plausible, not what we would like to believe, not what one or two witnesses claim, but only what is supported by hard evidence rigorously and skeptically examined. Extraordinary claims require extraordinary evidence.
I believe that the extraordinary should be pursued. But extraordinary claims require extraordinary evidence.
Forgotten were the elementary rules of logic, that extraordinary claims require extraordinary evidence and that what can be asserted without evidence can also be dismissed without evidence.
For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.
The evidence that at least one extraterrestrial civilization has visited Earth is extensive both in scope and detail. In its totality it comprises a body of evidence which at the very least supports the general assessment that extraterrestrial life has been detected, and that a vigorous program of research and serious diplomatic initiatives is warranted.
Extraordinary claims require extraordinary evidence, and it is my job, my responsibility, as an astronomer to remind people that alien hypotheses should always be a last resort.
Extraordinary claims demand extraordinary evidence
Drop the idea of being Extraordinary! It's keeping you mediocre. To be Ordinary is the most extraordinary thing in the world. The Ordinary person has light in his eyes; he has become extraordinary but he has no idea of it.
you have often seen in the cinema, erich, haven't you, that between extraordinary people extraordinary things like for example extraordinary love can arise. so we only have to be extraordinary and see what happens.
Extraordinary observations require extraordinary evidence to make them believable.
Extraordinary observations require extraordinary evidence.
Extraordinary allegations require extraordinary evidence.
Extraordinary afflictions are not always the punishment of extraordinary sins, but sometimes the trial of extraordinary graces.
Extraordinary things only happen to extraordinary people. Maybe it's a sign that you've got an extraordinary destiny--something greater than you could've imagined.
It is not extraordinary that the extraterrestrial origin of women was a recurrent theme of science fiction.
'Celebrity' is sort of an idea. I mean, I get to do something extraordinary, but I don't think it makes me extraordinary. That's my opinion. I like to be an artist; I like to do things that are involved in the arts, but I don't think it makes me more special than a doctor, for example. A doctor is an extraordinary person.
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