--- title: "11 Claims Quotes By Carl Sagan" description: "11 Claims quotes by Carl Sagan. Plus more from Carl Sagan and more Claims sayings from other authors." image: "https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg" --- > [Extraordinary claim requires extraordinary proof.](https://sms4smile.com/quotes/carl-sagan/extraordinary-claim-requires-extraordinary-proof/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg) > [Extraordinary claims demand extraordinary evidence](https://sms4smile.com/quotes/carl-sagan/extraordinary-claims-demand-extraordinary-evidence/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/aa1/carl-sagan-160_claims_extraordinary-claims-demand-extraordinar_993576.jpg) > [I believe that the extraordinary should be pursued. But extraordinary claims require extraordinary evidence.](https://sms4smile.com/quotes/carl-sagan/i-believe-that-the-extraordinary-should-be-pursued-but-extraordinary/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/157/carl-sagan-160_believe_i-believe-that-the-extraordinary-should_2209292.jpg) > [For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.](https://sms4smile.com/quotes/carl-sagan/for-years-i-ve-been-stressing-with-regard-to-ufos-that-extraordinary/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/72e/carl-sagan-160_atheism_for-years-i-ve-been-stressing-with-regar_1415742.jpg) > [What counts is not what sounds plausible, not what we would like to believe, not what one or two witnesses claim, but…](https://sms4smile.com/quotes/carl-sagan/what-counts-is-not-what-sounds-plausible-not-what-we-would-like-to/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/251/carl-sagan-160_astronomy_what-counts-is-not-what-sounds-plausible_1309113.jpg) > [Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same time subject all claims…](https://sms4smile.com/quotes/carl-sagan/ask-courageous-questions-do-not-be-satisfied-with-superficial-answers/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/a4c/carl-sagan-160_answers_ask-courageous-questions-do-not-be-satis_272433.jpg) > [Science arouses a soaring sense of wonder. But so does pseudoscience. Sparse and poor popularizations of science abandon ecological niches that pseudoscience…](https://sms4smile.com/quotes/carl-sagan/science-arouses-a-soaring-sense-of-wonder-but-so-does-pseudoscience/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/bea/carl-sagan-160_abandon_science-arouses-a-soaring-sense-of-wonde_154368.jpg) > [For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this…](https://sms4smile.com/quotes/carl-sagan/for-all-i-know-we-may-be-visited-by-a-different-extraterrestrial/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/018/carl-sagan-160_civilization_for-all-i-know-we-may-be-visited-by-a-di_90915.jpg) > [Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but…](https://sms4smile.com/quotes/carl-sagan/science-looks-skeptically-at-all-claims-to-knowledge-old-and-new-it/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/e48/carl-sagan-160_authority_science-looks-skeptically-at-all-claims_2658349.jpg) > [Is it fair to be suspicious of an entire profession because of a few bad apples? There are at least two important…](https://sms4smile.com/quotes/carl-sagan/is-it-fair-to-be-suspicious-of-an-entire-profession-because-of-a-few/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/6b6/carl-sagan-160_ability_is-it-fair-to-be-suspicious-of-an-entire_2207911.jpg) > [The claim is also sometimes made that science is as arbitrary or irrational as all other claims to knowledge, or that reason…](https://sms4smile.com/quotes/carl-sagan/the-claim-is-also-sometimes-made-that-science-is-as-arbitrary-or/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) [Image](https://sms4smile.com/quotes/i/995/carl-sagan-160_arbitrary_the-claim-is-also-sometimes-made-that-sc_511945.jpg) ## Other authors on Claims ## More by Carl Sagan > [It is sometimes said that scientists are unromantic, that their passion to figure out robs the world of beauty and mystery. But is it…](https://sms4smile.com/quotes/carl-sagan/it-is-sometimes-said-that-scientists-are-unromantic-that-their/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [The prediction of nuclear winter is drawn not, of course, from any direct experience with the consequences of global nuclear war, but rather from…](https://sms4smile.com/quotes/carl-sagan/the-prediction-of-nuclear-winter-is-drawn-not-of-course-from-any/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [The suppression of uncomfortable ideas may be common in religion or in politics, but it is not the path to knowledge; it has no…](https://sms4smile.com/quotes/carl-sagan/the-suppression-of-uncomfortable-ideas-may-be-common-in-religion-or/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [“Telepathy’ literally means to feel at a distance, just as ‘telephone’ is to hear at a distance and ‘television’ is to see at a…](https://sms4smile.com/quotes/carl-sagan/telepathy-literally-means-to-feel-at-a-distance-just-as-telephone-is/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [“On the scale of worlds—to say nothing of stars or galaxies—humans are inconsequential, a thin film of life on an obscure and solitary lump…](https://sms4smile.com/quotes/carl-sagan/on-the-scale-of-worlds-to-say-nothing-of-stars-or-galaxies-humans-are/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies,…](https://sms4smile.com/quotes/carl-sagan/every-one-of-us-is-in-the-cosmic-perspective-precious-if-a-human/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [In our time, we have sifted the sands of Mars, we have established a presence there, we have fulfilled a century of dreams!](https://sms4smile.com/quotes/carl-sagan/in-our-time-we-have-sifted-the-sands-of-mars-we-have-established-a/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [ “\[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :\] If ‘fulfilled prophecy’ is your criterion,… ](https://sms4smile.com/quotes/carl-sagan/when-a-religious-couple-wrote-to-sagan-about-fulfilled-prophecies-he/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [Don't judge everyone else by your own limited experience.](https://sms4smile.com/quotes/carl-sagan/don-t-judge-everyone-else-by-your-own-limited-experience/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [“Books permit us to voyage through time, to tap the wisdom of our ancestors. The library connects us with the insight and knowledge, painfully…](https://sms4smile.com/quotes/carl-sagan/books-permit-us-to-voyage-through-time-to-tap-the-wisdom-of-our/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [We live on a hunk of rock and metal that circles a humdrum star that is one of 400 billion other stars that make…](https://sms4smile.com/quotes/carl-sagan/we-live-on-a-hunk-of-rock-and-metal-that-circles-a-humdrum-star-that/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [A tiny blue dot set in a sunbeam. Here it is. That's where we live. That's home. We humans are one species and this…](https://sms4smile.com/quotes/carl-sagan/a-tiny-blue-dot-set-in-a-sunbeam-here-it-is-that-s-where-we-live-that/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [Any sufficiently crisp question can be answered by a single binary digit-0 or 1, yes or no.](https://sms4smile.com/quotes/carl-sagan/any-sufficiently-crisp-question-can-be-answered-by-a-single-binary/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [Humans — who enslave, castrate, experiment on, and fillet other animals — have had an understandable penchant for pretending animals do not feel pain.…](https://sms4smile.com/quotes/carl-sagan/humans-who-enslave-castrate-experiment-on-and-fillet-other-animals/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) > [Every star may be a sun to someone.](https://sms4smile.com/quotes/carl-sagan/every-star-may-be-a-sun-to-someone/) [Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "ItemList", "@id": "https://sms4smile.com/quotes/about/claims/carl-sagan/#itemlist", "name": "11 Claims Quotes By Carl Sagan", "numberOfItems": 11, "itemListElement": [ { "@type": "ListItem", "position": 1, "item": { "@type": "Quotation", "text": "Extraordinary claim requires extraordinary proof.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/extraordinary-claim-requires-extraordinary-proof/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg", "contentUrl": "https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg", "url": "https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg", "width": 1080, "height": 1080, "caption": "“Extraordinary claim requires extraordinary proof.” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 2, "item": { "@type": "Quotation", "text": "Extraordinary claims demand extraordinary evidence", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/extraordinary-claims-demand-extraordinary-evidence/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/aa1/carl-sagan-160_claims_extraordinary-claims-demand-extraordinar_993576.jpg", "contentUrl": "https://sms4smile.com/quotes/i/aa1/carl-sagan-160_claims_extraordinary-claims-demand-extraordinar_993576.jpg", "url": "https://sms4smile.com/quotes/i/aa1/carl-sagan-160_claims_extraordinary-claims-demand-extraordinar_993576.jpg", "width": 1080, "height": 1080, "caption": "“Extraordinary claims demand extraordinary evidence” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 3, "item": { "@type": "Quotation", "text": "I believe that the extraordinary should be pursued. 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Extraordinary claims require extraordinary evidence.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/what-counts-is-not-what-sounds-plausible-not-what-we-would-like-to/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/251/carl-sagan-160_astronomy_what-counts-is-not-what-sounds-plausible_1309113.jpg", "contentUrl": "https://sms4smile.com/quotes/i/251/carl-sagan-160_astronomy_what-counts-is-not-what-sounds-plausible_1309113.jpg", "url": "https://sms4smile.com/quotes/i/251/carl-sagan-160_astronomy_what-counts-is-not-what-sounds-plausible_1309113.jpg", "width": 1080, "height": 1080, "caption": "“What counts is not what sounds plausible, not what we would like to believe, not what one or two witnesses…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 6, "item": { "@type": "Quotation", "text": "Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same time subject all claims to knowledge, without exception, to intense skeptical scrutiny. Be aware of human fallibility. Cherish your species and your planet.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/ask-courageous-questions-do-not-be-satisfied-with-superficial-answers/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/a4c/carl-sagan-160_answers_ask-courageous-questions-do-not-be-satis_272433.jpg", "contentUrl": "https://sms4smile.com/quotes/i/a4c/carl-sagan-160_answers_ask-courageous-questions-do-not-be-satis_272433.jpg", "url": "https://sms4smile.com/quotes/i/a4c/carl-sagan-160_answers_ask-courageous-questions-do-not-be-satis_272433.jpg", "width": 1080, "height": 1080, "caption": "“Ask courageous questions. Do not be satisfied with superficial answers. Be open to wonder and at the same…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 7, "item": { "@type": "Quotation", "text": "Science arouses a soaring sense of wonder. But so does pseudoscience. Sparse and poor popularizations of science abandon ecological niches that pseudoscience promptly fills. If it were widely understood that claims to knowledge require adequate evidence before they can be accepted, there would be no room for pseudoscience.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/science-arouses-a-soaring-sense-of-wonder-but-so-does-pseudoscience/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/bea/carl-sagan-160_abandon_science-arouses-a-soaring-sense-of-wonde_154368.jpg", "contentUrl": "https://sms4smile.com/quotes/i/bea/carl-sagan-160_abandon_science-arouses-a-soaring-sense-of-wonde_154368.jpg", "url": "https://sms4smile.com/quotes/i/bea/carl-sagan-160_abandon_science-arouses-a-soaring-sense-of-wonde_154368.jpg", "width": 1080, "height": 1080, "caption": "“Science arouses a soaring sense of wonder. But so does pseudoscience. Sparse and poor popularizations of…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 8, "item": { "@type": "Quotation", "text": "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.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/for-all-i-know-we-may-be-visited-by-a-different-extraterrestrial/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/018/carl-sagan-160_civilization_for-all-i-know-we-may-be-visited-by-a-di_90915.jpg", "contentUrl": "https://sms4smile.com/quotes/i/018/carl-sagan-160_civilization_for-all-i-know-we-may-be-visited-by-a-di_90915.jpg", "url": "https://sms4smile.com/quotes/i/018/carl-sagan-160_civilization_for-all-i-know-we-may-be-visited-by-a-di_90915.jpg", "width": 1080, "height": 1080, "caption": "“For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 9, "item": { "@type": "Quotation", "text": "Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but to vigorous debate, and in many respects that's the secret of its success.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/science-looks-skeptically-at-all-claims-to-knowledge-old-and-new-it/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/e48/carl-sagan-160_authority_science-looks-skeptically-at-all-claims_2658349.jpg", "contentUrl": "https://sms4smile.com/quotes/i/e48/carl-sagan-160_authority_science-looks-skeptically-at-all-claims_2658349.jpg", "url": "https://sms4smile.com/quotes/i/e48/carl-sagan-160_authority_science-looks-skeptically-at-all-claims_2658349.jpg", "width": 1080, "height": 1080, "caption": "“Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 10, "item": { "@type": "Quotation", "text": "Is it fair to be suspicious of an entire profession because of a few bad apples? There are at least two important differences, it seems to me. First, no one doubts that science actually works, whatever mistaken and fraudulent claim may from time to time be offered. But whether there are any miraculous cures from faith-healing, beyond the body's own ability to cure itself, is very much at issue. Secondly, the expose' of fraud and error in science is made almost exclusively by science. But the exposure of fraud and error in faith-healing is almost never done by other faith-healers.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/is-it-fair-to-be-suspicious-of-an-entire-profession-because-of-a-few/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/6b6/carl-sagan-160_ability_is-it-fair-to-be-suspicious-of-an-entire_2207911.jpg", "contentUrl": "https://sms4smile.com/quotes/i/6b6/carl-sagan-160_ability_is-it-fair-to-be-suspicious-of-an-entire_2207911.jpg", "url": "https://sms4smile.com/quotes/i/6b6/carl-sagan-160_ability_is-it-fair-to-be-suspicious-of-an-entire_2207911.jpg", "width": 1080, "height": 1080, "caption": "“Is it fair to be suspicious of an entire profession because of a few bad apples? There are at least two…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } }, { "@type": "ListItem", "position": 11, "item": { "@type": "Quotation", "text": "The claim is also sometimes made that science is as arbitrary or irrational as all other claims to knowledge, or that reason itself is an illusion. As Ethan Allen said Those who invalidate reason ought seriously to consider whether they argue against reason with or without reason; if with reason, then they establish the principle that they are labouring to dethrone. If they argue without reason, which they must do, in order to be consistent with themselves, they are out of reach of rational conviction, nor do they deserve a rational argument.", "creator": { "@type": "Person", "name": "Carl Sagan" }, "url": "https://sms4smile.com/quotes/carl-sagan/the-claim-is-also-sometimes-made-that-science-is-as-arbitrary-or/", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/995/carl-sagan-160_arbitrary_the-claim-is-also-sometimes-made-that-sc_511945.jpg", "contentUrl": "https://sms4smile.com/quotes/i/995/carl-sagan-160_arbitrary_the-claim-is-also-sometimes-made-that-sc_511945.jpg", "url": "https://sms4smile.com/quotes/i/995/carl-sagan-160_arbitrary_the-claim-is-also-sometimes-made-that-sc_511945.jpg", "width": 1080, "height": 1080, "caption": "“The claim is also sometimes made that science is as arbitrary or irrational as all other claims to…” — Carl Sagan", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } } } ] }, { "@type": "CollectionPage", "@id": "https://sms4smile.com/quotes/about/claims/carl-sagan/#webpage", "url": "https://sms4smile.com/quotes/about/claims/carl-sagan/", "name": "Claims Quotes by Carl Sagan", "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "mainEntity": { "@id": "https://sms4smile.com/quotes/about/claims/carl-sagan/#itemlist" }, "primaryImageOfPage": { "@id": "https://sms4smile.com/quotes/i/e25/carl-sagan-160_claims_extraordinary-claim-requires-extraordina_1189441.jpg" }, "description": "11 Claims quotes by Carl Sagan. 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