Quotations about   evidence

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Don’t you believe in flying saucers, they ask me? Don’t you believe in telepathy? — in ancient astronauts? — in the Bermuda triangle? — in life after death?

No, I reply. No, no, no, no, and again no.

One person recently, goaded into desperation by the litany of unrelieved negation, burst out “Don’t you believe in anything?”

“Yes”, I said. “I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I’ll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.”

Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
The Roving Mind (1983)

See Carl Sagan.
Added on 2-Aug-16 | Last updated 2-Aug-16
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Anger is the common substitute for logic among those who have no evidence for what they desperately want to believe.

Isaac Asimov (1920-1992) Russian-American author, polymath, biochemist
“The Tyrannosaurus Prescription”
Added on 29-Mar-16 | Last updated 29-Mar-16
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But the problem with any ideology is that it gives the answer before you look at the evidence. So you have to mold the evidence to get the answer that you’ve already decided you’ve got to have. It doesn’t work that way.

Clinton - ideology - wist_info quote

William Jefferson "Bill" Clinton (b. 1946) American politician, US President (1993-2001)
Interview, The Daily Show with Jon Stewart (20 Sep 2012)
Added on 17-Feb-16 | Last updated 17-Feb-16
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In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence. […] No testimony is sufficient to establish a miracle, unless the testimony be of such a kind, that its falsehood would be more miraculous, than the fact, which it endeavors to establish.

David Hume (1711-1776) Scottish philosopher, economist, historian, empiricist
An Enquiry Concerning Human Understanding, Sec. 10 “Of Miracles,” Part 1 (1748)

Often given as just, "A wise man proportions his belief to the evidence."
Added on 24-Apr-15 | Last updated 24-Apr-15
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Don’t think there are no crocodiles because the water is calm.

Other Authors and Sources
Malayan proverb
Added on 11-Mar-14 | Last updated 11-Mar-14
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The human understanding when it has once adopted an opinion (either as being the received opinion or as being agreeable to itself) draws all things else to support and agree with it. And though there be a greater number and weight of instances to be found on the other side, yet these it either neglects and despises, or else by some distinction sets aside and rejects, in order that by this great and pernicious predetermination the authority of its former conclusions may remain inviolate.

Francis Bacon (1561-1626) English philosopher, scientist, author, statesman
Novum Organum, Book 1, Aphorism 46 (1620)
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Added on 20-Sep-10 | Last updated 16-May-16
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Extraordinary claims require extraordinary evidence.

Carl Sagan (1934-1996) American scientist and writer
Cosmos (1980)

Parallels a comment by Marcello Truzzi, "Extraordinary claims require extraordinary proof."
Added on 6-Aug-07 | Last updated 2-Aug-16
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The problem with ideology is, if you’ve got an ideology, you’ve already got your mind made up. You know all the answers and that makes evidence irrelevant and arguments a waste of time. You tend to govern by assertion and attacks.

William Jefferson "Bill" Clinton (b. 1946) American politician, US President (1993-2001)
Speech at event sponsored by the Center for American Progress (18 Oct 2006)
Added on 18-Jul-07 | Last updated 17-Feb-16
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They are ill discoverers that think there is no land, when they can see nothing but sea.

Francis Bacon (1561-1626) English philosopher, scientist, author, statesman
De Augmentis Scientiarum [Advancement of Learning], Book 3, ch. 4 (1605)
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Alt trans: "[They] are indolent discoverers who seeing nothing beyond but sea and sky, absolutely deny there can be any land beyond them."

Another source notes it as Book 2, ch. 7.
Added on 1-Feb-04 | Last updated 11-Aug-16
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Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passions, they cannot alter the state of the facts and evidence.

John Adams (1735-1826) American lawyer, Founding Father, statesman, US President (1797-1801)
“Argument in Defense of the Soldiers in the Boston Massacre Trials” (4 Dec 1770)
Added on 1-Feb-04 | Last updated 29-Mar-17
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