A Quote by Carl Sagan

For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence. — © Carl Sagan
For years I've been stressing with regard to UFOs that 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.
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.
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 observations require extraordinary evidence to make them believable.
Extraordinary claims demand extraordinary evidence
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.
Extraordinary observations require extraordinary evidence.
Extraordinary allegations require extraordinary evidence.
It is an understatement to say that the time has arrived for a serious and open international dialogue regarding the possibility of future interplanetary relations. In no other area of human experience has so much evidence existed for so long, and yet been attended by such a paucity of serious research and analysis - at least in the civilian domain. While the subject matter of UFOs itself is extraordinary, it is the absence of a serious human response to it that is most extraordinary.
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.
I seem to have been everywhere in the last 30 years, maybe not in the epicenter but flying around the periphery of extraordinary events and equally extraordinary people.
Achievement does not require extraordinary ability. Achievement comes from ordinary abilities applied with extraordinary persistence.
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.
We can begin a discussion of artmaking by noting that from very early (as long ago as 200,000 years), humans have been naturally attracted to the extraordinary as a dimension of experience and that at some point they seem also to have been moved to make the ordinary extraordinary-that is, to shape or elaborate everyday, mundane reality and thereby transform it into something special, different from the everyday.
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