--- title: "Meaning & Key Takeaway of: In so far as a scientific statement…" description: "\"In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reali..." image: "https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg" --- # In so far as a scientific statement speaks about reality… ![“In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.” quote by Karl Popper](https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg) [Download](https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg) [Open image](https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg) > “In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.” [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. A scientific claim must be testable; if it cannot be tested, it is not about the real world. **In simple terms:** Science needs testable claims. Key Takeaway Require falsifiability in research. Themes science philosophy methodology Mood critical inquisitive Type analytical philosophical When to use this quote - research design - policy analysis - education curricula - public discourse Key Concepts falsifiability empiricism demarcation Questions to Reflect On - How can we assess claims that are not empirically testable? - What role do non‑scientific narratives play in society? A Different Perspective Non‑falsifiable statements can still be meaningful in ethics or art. ★ ★ ★ ★ ★ No ratings yet [Falsifiable](https://sms4smile.com/quotes/about/falsifiable/) [Falsifiable Does](https://sms4smile.com/quotes/about/falsifiable-does-6043325/) [Falsifiable Far](https://sms4smile.com/quotes/about/falsifiable-far-6043326/) [Far Falsifiable](https://sms4smile.com/quotes/about/far-falsifiable-6043327/) [Reality](https://sms4smile.com/quotes/about/reality/) [Reality Falsifiable](https://sms4smile.com/quotes/about/reality-falsifiable-6043324/) [Science](https://sms4smile.com/quotes/about/science/) [Speak](https://sms4smile.com/quotes/about/speak/) ## Related quotes > [“The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological…](https://sms4smile.com/quotes/karl-popper/the-difficulties-connected-with-my-criterion-of-demarcation-d-are/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [“If they had been, explained Falk, they would have had to come up with a falsifiable hypothesis. For instance, if the hypothesis is that…](https://sms4smile.com/quotes/ori-brafman/if-they-had-been-explained-falk-they-would-have-had-to-come-up-with-a/) [Ori Brafman](https://sms4smile.com/quotes/author/ori-brafman/) > [“Science, however, is never conducted as a popularity contest, but instead advances through testable, reproducible, and falsifiable theories.”](https://sms4smile.com/quotes/michio-kaku/science-however-is-never-conducted-as-a-popularity-contest-but/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [“A good scientific law or theory is falsifiable just because it makes definite claims about the world. For the falsificationist, If follows fairly readily…](https://sms4smile.com/quotes/alan-f-chalmers/a-good-scientific-law-or-theory-is-falsifiable-just-because-it-makes/) [Alan F. Chalmers](https://sms4smile.com/quotes/author/alan-f-chalmers/) > [“Not only are there meaningless questions, but many of the problems with which the human intellect has tortured itself turn out to be only…](https://sms4smile.com/quotes/percy-williams-bridgman/not-only-are-there-meaningless-questions-but-many-of-the-problems/) [Percy Williams Bridgman](https://sms4smile.com/quotes/author/percy-williams-bridgman/) > [The problem with intelligent-design theory, is not that it is false but that it is not falsifiable. Not being susceptible to contradicting evidence, it…](https://sms4smile.com/quotes/george-will/the-problem-with-intelligent-design-theory-is-not-that-it-is-false/) [George Will](https://sms4smile.com/quotes/author/george-will/) > [“Methodological naturalism is a “ground rule” of science today which requires scientists to seek explanations in the world around us based upon what we…](https://sms4smile.com/quotes/robert-t-pennock/methodological-naturalism-is-a-ground-rule-of-science-today-which/) [Robert T. Pennock](https://sms4smile.com/quotes/author/robert-t-pennock/) > [Falsifiability for a theory is great, but a theory can still be respectable even if it is not falsifiable, as long as it is…](https://sms4smile.com/quotes/brian-greene/falsifiability-for-a-theory-is-great-but-a-theory-can-still-be/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [A good scientific theory is one which is falsifiable, which has not been falsified.](https://sms4smile.com/quotes/richard-dawkins/a-good-scientific-theory-is-one-which-is-falsifiable-which-has-not/) [Richard Dawkins](https://sms4smile.com/quotes/author/richard-dawkins/) > [Science does not limit itself merely to what is currently verifiable. But it is interested in questions that are potentially verifiable (or, rather, falsifiable).](https://sms4smile.com/quotes/sam-harris/science-does-not-limit-itself-merely-to-what-is-currently-verifiable/) [Sam Harris](https://sms4smile.com/quotes/author/sam-harris/) > [“We are talking about a programme which claims that ‘processed foods do not contain water’, possibly the single most rapidly falsifiable statement I’ve seen…](https://sms4smile.com/quotes/ben-goldacre/we-are-talking-about-a-programme-which-claims-that-processed-foods-do/) [Ben Goldacre](https://sms4smile.com/quotes/author/ben-goldacre/) > [Science is defined in various ways, but today it is generally restricted to something which is experimental, which is repeatable, which can be predicted,…](https://sms4smile.com/quotes/walter-lang/science-is-defined-in-various-ways-but-today-it-is-generally/) [Walter Lang](https://sms4smile.com/quotes/author/walter-lang/) > [In science, if an idea is not falsifiable, it is not that it is wrong, it is that we cannot determine if it is…](https://sms4smile.com/quotes/michael-shermer/in-science-if-an-idea-is-not-falsifiable-it-is-not-that-it-is-wrong/) [Michael Shermer](https://sms4smile.com/quotes/author/michael-shermer/) > [I just speak the truth. I keep it real.](https://sms4smile.com/quotes/marlon-vera/i-just-speak-the-truth-i-keep-it-real/) [Marlon Vera](https://sms4smile.com/quotes/author/marlon-vera/) > [I receive something we might euphemistically call an 'inappropriately hostile' response - that is to say, more than fair criticism or even fair anger…](https://sms4smile.com/quotes/mary-beard/i-receive-something-we-might-euphemistically-call-an-inappropriately/) [Mary Beard](https://sms4smile.com/quotes/author/mary-beard/) ## More by Karl Popper > [Science is not a system of certain, or -established, statements; nor is it a system which steadily advances towards a state of finality... And…](https://sms4smile.com/quotes/karl-popper/science-is-not-a-system-of-certain-or-established-statements-nor-is/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [“As indicated by our example, methodological nominalism is nowadays fairly generally accepted in the natural sciences. The problems of the social sciences, on the…](https://sms4smile.com/quotes/karl-popper/as-indicated-by-our-example-methodological-nominalism-is-nowadays/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [Science is perhaps the only human activity in which errors are systematically criticized and, in time, corrected.](https://sms4smile.com/quotes/karl-popper/science-is-perhaps-the-only-human-activity-in-which-errors-are/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [A system is empirical or scientific only if it is capable of being tested by experience. These considerations suggest that not the verifiability but…](https://sms4smile.com/quotes/karl-popper/a-system-is-empirical-or-scientific-only-if-it-is-capable-of-being/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [Bold ideas, unjustified anticipations, and speculative thought, are our only means for interpreting nature: our only organon, our only instrument, for grasping her. And…](https://sms4smile.com/quotes/karl-popper/bold-ideas-unjustified-anticipations-and-speculative-thought-are-our/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [ \[The aim of science is\] to explain what so far has taken to be an explicans, such as a law of nature. The task… ](https://sms4smile.com/quotes/karl-popper/the-aim-of-science-is-to-explain-what-so-far-has-taken-to-be-an/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [There can be no ultimate statements science: there can be no statements in science which can not be tested, and therefore none which cannot…](https://sms4smile.com/quotes/karl-popper/there-can-be-no-ultimate-statements-science-there-can-be-no/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [Evolution is not a fact. Evolution doesn't even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it…](https://sms4smile.com/quotes/karl-popper/evolution-is-not-a-fact-evolution-doesn-t-even-qualify-as-a-theory-or/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [I am opposed to looking upon logic as a kind of game. ... One might think that it is a matter of choice or…](https://sms4smile.com/quotes/karl-popper/i-am-opposed-to-looking-upon-logic-as-a-kind-of-game-one-might-think/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [The history of science, like the history of all human ideas, is a history of irresponsible dreams, of obstinacy, and of error.](https://sms4smile.com/quotes/karl-popper/the-history-of-science-like-the-history-of-all-human-ideas-is-a/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [Good tests kill flawed theories; we remain alive to guess again.](https://sms4smile.com/quotes/karl-popper/good-tests-kill-flawed-theories-we-remain-alive-to-guess-again/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [There is no pure, disinterested, theory-free observation,](https://sms4smile.com/quotes/karl-popper/there-is-no-pure-disinterested-theory-free-observation/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [We have the right not to tolerate the intolerant. We should tolerate even them whenever we can do so without running a great risk;…](https://sms4smile.com/quotes/karl-popper/we-have-the-right-not-to-tolerate-the-intolerant-we-should-tolerate/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [Better our hypotheses die for our errors than ourselves.](https://sms4smile.com/quotes/karl-popper/better-our-hypotheses-die-for-our-errors-than-ourselves/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [“Every time we proceed to explain some conjectural law or theory by a new conjectural theory of a higher degree of universality, we are…](https://sms4smile.com/quotes/karl-popper/every-time-we-proceed-to-explain-some-conjectural-law-or-theory-by-a/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) [Explore all 181 Karl Popper quotes ](https://sms4smile.com/quotes/author/karl-popper/) ## More Falsifiable quotes > [In science, if an idea is not falsifiable, it is not that it is wrong, it is that we cannot determine if it is…](https://sms4smile.com/quotes/michael-shermer/in-science-if-an-idea-is-not-falsifiable-it-is-not-that-it-is-wrong/) [Michael Shermer](https://sms4smile.com/quotes/author/michael-shermer/) > [Science is defined in various ways, but today it is generally restricted to something which is experimental, which is repeatable, which can be predicted,…](https://sms4smile.com/quotes/walter-lang/science-is-defined-in-various-ways-but-today-it-is-generally/) [Walter Lang](https://sms4smile.com/quotes/author/walter-lang/) > [“We are talking about a programme which claims that ‘processed foods do not contain water’, possibly the single most rapidly falsifiable statement I’ve seen…](https://sms4smile.com/quotes/ben-goldacre/we-are-talking-about-a-programme-which-claims-that-processed-foods-do/) [Ben Goldacre](https://sms4smile.com/quotes/author/ben-goldacre/) > [Science does not limit itself merely to what is currently verifiable. But it is interested in questions that are potentially verifiable (or, rather, falsifiable).](https://sms4smile.com/quotes/sam-harris/science-does-not-limit-itself-merely-to-what-is-currently-verifiable/) [Sam Harris](https://sms4smile.com/quotes/author/sam-harris/) > [A good scientific theory is one which is falsifiable, which has not been falsified.](https://sms4smile.com/quotes/richard-dawkins/a-good-scientific-theory-is-one-which-is-falsifiable-which-has-not/) [Richard Dawkins](https://sms4smile.com/quotes/author/richard-dawkins/) > [Falsifiability for a theory is great, but a theory can still be respectable even if it is not falsifiable, as long as it is…](https://sms4smile.com/quotes/brian-greene/falsifiability-for-a-theory-is-great-but-a-theory-can-still-be/) [Brian Greene](https://sms4smile.com/quotes/author/brian-greene/) > [“Methodological naturalism is a “ground rule” of science today which requires scientists to seek explanations in the world around us based upon what we…](https://sms4smile.com/quotes/robert-t-pennock/methodological-naturalism-is-a-ground-rule-of-science-today-which/) [Robert T. Pennock](https://sms4smile.com/quotes/author/robert-t-pennock/) > [The problem with intelligent-design theory, is not that it is false but that it is not falsifiable. Not being susceptible to contradicting evidence, it…](https://sms4smile.com/quotes/george-will/the-problem-with-intelligent-design-theory-is-not-that-it-is-false/) [George Will](https://sms4smile.com/quotes/author/george-will/) > [“Not only are there meaningless questions, but many of the problems with which the human intellect has tortured itself turn out to be only…](https://sms4smile.com/quotes/percy-williams-bridgman/not-only-are-there-meaningless-questions-but-many-of-the-problems/) [Percy Williams Bridgman](https://sms4smile.com/quotes/author/percy-williams-bridgman/) > [“The difficulties connected with my criterion of demarcation (D) are important, but must not be exaggerated. It is vague, since it is a methodological…](https://sms4smile.com/quotes/karl-popper/the-difficulties-connected-with-my-criterion-of-demarcation-d-are/) [Karl Popper](https://sms4smile.com/quotes/author/karl-popper/) > [“A good scientific law or theory is falsifiable just because it makes definite claims about the world. For the falsificationist, If follows fairly readily…](https://sms4smile.com/quotes/alan-f-chalmers/a-good-scientific-law-or-theory-is-falsifiable-just-because-it-makes/) [Alan F. Chalmers](https://sms4smile.com/quotes/author/alan-f-chalmers/) > [“Science, however, is never conducted as a popularity contest, but instead advances through testable, reproducible, and falsifiable theories.”](https://sms4smile.com/quotes/michio-kaku/science-however-is-never-conducted-as-a-popularity-contest-but/) [Michio Kaku](https://sms4smile.com/quotes/author/michio-kaku/) > [“If they had been, explained Falk, they would have had to come up with a falsifiable hypothesis. For instance, if the hypothesis is that…](https://sms4smile.com/quotes/ori-brafman/if-they-had-been-explained-falk-they-would-have-had-to-come-up-with-a/) [Ori Brafman](https://sms4smile.com/quotes/author/ori-brafman/) [Browse all 14 Falsifiable quotes ](https://sms4smile.com/quotes/about/falsifiable/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.", "creator": { "@type": "Person", "name": "Karl Popper" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/karl-popper/in-so-far-as-a-scientific-statement-speaks-about-reality-it-must-be/", "about": { "@type": "Thing", "name": "Falsifiable" }, "@id": "https://sms4smile.com/quotes/karl-popper/in-so-far-as-a-scientific-statement-speaks-about-reality-it-must-be/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg", "contentUrl": "https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg", "url": "https://sms4smile.com/quotes/i/31f/karl-popper-2167_falsifiable_in-so-far-as-a-scientific-statement-spea_3218841.jpg", "width": 1080, "height": 1080, "caption": "“In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not…” — Karl Popper", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://sms4smile.com/" }, { "@type": "ListItem", "position": 2, "name": "Quotes", "item": "https://sms4smile.com/quotes/" }, { "@type": "ListItem", "position": 3, "name": "Karl Popper", "item": "https://sms4smile.com/quotes/author/karl-popper/" }, { "@type": "ListItem", "position": 4, "name": "In so far as a scientific...", "item": "https://sms4smile.com/quotes/karl-popper/in-so-far-as-a-scientific-statement-speaks-about-reality-it-must-be/" } ], "@id": "https://sms4smile.com/quotes/karl-popper/in-so-far-as-a-scientific-statement-speaks-about-reality-it-must-be/#breadcrumb" }, { "@type": "WebSite", "@id": "https://sms4smile.com/quotes/#website", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "publisher": { "@id": "https://sms4smile.com/quotes/#organization" } }, { "@type": "Organization", "@id": "https://sms4smile.com/quotes/#organization", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "logo": { "@type": "ImageObject", "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png", "width": 512, "height": 512 } } ] } ```