A Quote by Pierre-Simon Laplace

The weight of evidence for an extraordinary claim must be proportioned to its strangeness.

Pierre-Simon Laplace

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Claim Evidence Extraordinary Must Strangeness Weight

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Pierre-Simon Laplace
French - Mathematician
March 23, 1749 - March 5, 1827

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.

Carl Sagan

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.

Christopher Hitchens

I believe that the extraordinary should be pursued. But extraordinary claims require extraordinary evidence.

Carl Sagan

People have a right to their own opinions, but not to their own facts. Evidence must be located, not created, and opinions not backed by evidence cannot be given much weight.

James W. Loewen

Many people struggle with losing weight and then regaining it. But there is no convincing evidence that the effort to lose weight actually promotes more weight gain in the long run.

Francis Collins

Extraordinary observations require extraordinary evidence to make them believable.

Carl Sagan

For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

Carl Sagan

Extraordinary claim requires extraordinary proof.

Carl Sagan

If one were to claim that the U.S. occupation forces in Iraq have been provided with "keys to heaven" by the Pentagon, would that need historical research to be disproved or would you just say, "That's just propaganda"? Indeed, how can you disprove the claim that U.S. soldiers have such keys? Or why should you disprove such ridiculous claims? It is the accusers who must provide the evidence.

Mohammad Marandi

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.

Tabetha S. Boyajian

Extraordinary allegations require extraordinary evidence.

Lance Armstrong

Extraordinary observations require extraordinary evidence.

Buzz Aldrin

Extraordinary claims demand extraordinary evidence

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.

Carl Sagan

Because remote viewing is such an outlandish claim that will revolutionise the world, we need overwhelming evidence before we draw any conclusions. Right now we don't have that evidence.

Richard Wiseman

For weight gain, one must do cardio in the evening and for weight loss, in the morning. So, while gaining weight, I did weight training in the mornings and light cardio in the evenings.

Atul Kulkarni

A Quote by Pierre-Simon Laplace

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