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Scientific skepticism or rational skepticism (also spelled scepticism), sometimes referred to as skeptical inquiry, is a position in which one questions the veracity of claims lacking
empirical evidence Empirical evidence for a proposition is evidence, i.e. what supports or counters this proposition, that is constituted by or accessible to sense experience or experimental procedure. Empirical evidence is of central importance to the sciences and ...
. In practice, the term most commonly references the examination of claims and theories that appear to be beyond mainstream science, rather than the routine discussions and challenges among scientists. Scientific skepticism differs from
philosophical skepticism Philosophical skepticism ( UK spelling: scepticism; from Greek σκέψις ''skepsis'', "inquiry") is a family of philosophical views that question the possibility of knowledge. It differs from other forms of skepticism in that it even reject ...
, which questions humans' ability to claim any knowledge about the nature of the world and how they perceive it, and the similar but distinct
methodological skepticism Cartesian doubt is a form of methodological skepticism associated with the writings and methodology of René Descartes (March 31, 1596Feb 11, 1650). Scruton, R.''Modern Philosophy: An Introduction and Survey''(London: Penguin Books, 1994). Leiber, ...
, which is a systematic process of being skeptical about (or doubting) the truth of one's beliefs. in The skeptical movement (
British spelling Despite the various English dialects spoken from country to country and within different regions of the same country, there are only slight regional variations in English orthography, the two most notable variations being British and American ...
: sceptical movement) is a contemporary
social movement A social movement is a loosely organized effort by a large group of people to achieve a particular goal, typically a social or political one. This may be to carry out a social change, or to resist or undo one. It is a type of group action and may ...
based on the idea of scientific skepticism. The movement has the goal of investigating claims made on fringe topics and determining whether they are supported by
empirical research Empirical research is research using empirical evidence. It is also a way of gaining knowledge by means of direct and indirect observation or experience. Empiricism values some research more than other kinds. Empirical evidence (the record of one ...
and are
reproducible Reproducibility, also known as replicability and repeatability, is a major principle underpinning the scientific method. For the findings of a study to be reproducible means that results obtained by an experiment or an observational study or in a ...
, as part of a methodological norm pursuing "the extension of certified knowledge". Roots of the movement date at least from the 19th century, when people started publicly raising questions regarding the unquestioned acceptance of claims about
spiritism Spiritism (French: ''spiritisme''; Portuguese: ''espiritismo'') is a spiritualist, religious, and philosophical doctrine established in France in the 1850s by the French teacher, educational writer, and translator Hippolyte Léon Denizard Riva ...
, of various widely-held
superstition A superstition is any belief or practice considered by non-practitioners to be irrational or supernatural, attributed to fate or magic, perceived supernatural influence, or fear of that which is unknown. It is commonly applied to beliefs and ...
s, and of
pseudoscience Pseudoscience consists of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method. Pseudoscience is often characterized by contradictory, exaggerated or falsifiability, unfa ...
. Publications such as those of the Dutch
Vereniging tegen de Kwakzalverij The Vereniging tegen de Kwakzalverij or VtdK (English: ''Association Against Quackery'' or ''Society Against Quackery'') is a Dutch organisation that investigates the claims of alternative medicine and opposes quackery. Beginnings The organisat ...
(1881) also targeted
medical quackery Quackery, often synonymous with health fraud, is the promotion of fraudulent or ignorant medical practices. A quack is a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, k ...
. Using as a template the Belgian organization founded in 1949,
Comité Para The Comité Para, in full Comité belge pour l'Analyse Critique des parasciences ("Belgian Committee for the Critical Analysis of Parasciences"), is a Francophone Belgian skeptical non-profit organisation. Founded in 1949, the Comité Para regar ...
, Americans
Paul Kurtz Paul Kurtz (December 21, 1925 – October 20, 2012) was an American scientific skeptic and Secular humanism, secular humanist. He has been called "the father of secular humanism". He was Professor Emeritus of Philosophy at the University at Buff ...
and
Marcello Truzzi Marcello Truzzi (September 6, 1935 – February 2, 2003) was a professor of sociology at New College of Florida and later at Eastern Michigan University, founding co-chairman of the Committee for the Scientific Investigation of Claims of the Para ...
founded the Committee for the Scientific Investigation of Claims of the Paranormal (CSICOP), in
Amherst, New York Amherst () is a town in Erie County, New York, United States. Amherst is an inner ring suburb of Buffalo. As of 2020, the town had a total population of 129,595. This represents an increase from 122,366 as reported in the 2010 census. The second ...
, in 1976. Now known as the Committee for Skeptical Inquiry (CSI), this organization has inspired others to form similar groups worldwide.


Overview

Scientific skeptics maintain that empirical investigation of
reality Reality is the sum or aggregate of all that is real or existent within a system, as opposed to that which is only imaginary. The term is also used to refer to the ontological status of things, indicating their existence. In physical terms, r ...
leads to the most reliable empirical
knowledge Knowledge can be defined as awareness of facts or as practical skills, and may also refer to familiarity with objects or situations. Knowledge of facts, also called propositional knowledge, is often defined as true belief that is distinc ...
, and suggest that the
scientific method The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries; see the article history of scientific m ...
is best suited to verifying results. Scientific skeptics attempt to evaluate
claims Claim may refer to: * Claim (legal) * Claim of Right Act 1689 * Claims-based identity * Claim (philosophy) * Land claim * A ''main contention'', see conclusion of law * Patent claim * The assertion of a proposition; see Douglas N. Walton * A righ ...
based on verifiability and
falsifiability Falsifiability is a standard of evaluation of scientific theories and hypotheses that was introduced by the philosopher of science Karl Popper in his book ''The Logic of Scientific Discovery'' (1934). He proposed it as the cornerstone of a sol ...
; they discourage accepting claims which rely on
faith Faith, derived from Latin ''fides'' and Old French ''feid'', is confidence or trust in a person, thing, or In the context of religion, one can define faith as "belief in God or in the doctrines or teachings of religion". Religious people often ...
or
anecdotal evidence Anecdotal evidence is evidence based only on personal observation, collected in a casual or non-systematic manner. The term is sometimes used in a legal context to describe certain kinds of testimony which are uncorroborated by objective, independ ...
.
Paul Kurtz Paul Kurtz (December 21, 1925 – October 20, 2012) was an American scientific skeptic and Secular humanism, secular humanist. He has been called "the father of secular humanism". He was Professor Emeritus of Philosophy at the University at Buff ...
described scientific skepticism in his 1992 book The ''New Skepticism'', calling it an essential part of scientific inquiry.
The Skeptics Society The Skeptics Society is a nonprofit, member-supported organization devoted to promoting scientific skepticism and resisting the spread of pseudoscience, superstition, and irrational beliefs. The Skeptics Society was co-founded by Michael Sh ...
describes it as "the application of reason to any and all ideas—no
sacred cows ''Sacred Cows'', subtitled "The Songs That Helped Us," is an album featuring the rock band The Swirling Eddies, performing their own less-than-serious versions of popular CCM hits, released in 1996 on StarSong. The basic plan for the recor ...
allowed."
Robert K. Merton Robert King Merton (born Meyer Robert Schkolnick; July 4, 1910 – February 23, 2003) was an American sociologist who is considered a founding father of modern sociology, and a major contributor to the subfield of criminology. He served as th ...
introduced
Mertonian norms In 1942, Robert K. Merton described four aspects of science that later came to be called Mertonian norms: "four sets of institutional imperatives taken to comprise the ethos of modern science... communism, universalism, disinterestedness, and organ ...
, which assert that all ideas must be tested and are subject to rigorous, structured community scrutiny.
Kendrick Frazier Kendrick Crosby Frazier (March 19, 1942 – November 7, 2022) was an American science writer and longtime editor of ''Skeptical Inquirer'' magazine. He was also a former editor of '' Science News'', author or editor of ten books, and a Fellow of ...
said that scientific skeptics have a commitment to science, reason, evidence, and the quest for truth.'
Carl Sagan Carl Edward Sagan (; ; November 9, 1934December 20, 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on ext ...
emphasized the importance of being able to ask skeptical questions, recognizing fallacious or fraudulent arguments, and considering the validity of an argument rather than simply whether we like the conclusion. Similarly,
Steven Novella Steven Paul Novella (born July 29, 1964) is an American clinical neurologist and associate professor at Yale University School of Medicine. Novella is best known for his involvement in the skeptical movement as a host of ''The Skeptics' Guide t ...
described skepticism as selecting "beliefs and conclusions that are reliable and valid to ones that are comforting or convenient" and as the study of "pitfalls of human reason and the mechanisms of deception so as to avoid being deceived by others or themselves". Brian Dunning called skepticism "the process of finding a supported conclusion, not the justification of a preconceived conclusion.'' Skeptics often focus their criticism on claims they consider implausible, dubious or clearly contradictory to generally-accepted science. Scientific skeptics do not assert that unusual claims should be automatically rejected out of hand on ''a priori'' grounds—rather they argue that one should critically examine claims of paranormal or anomalous phenomena and that extraordinary claims would require extraordinary evidence in their favor before they could be accepted as having validity. From a scientific point of view, skeptics judge ideas on many criteria, including falsifiability,
Occam's Razor Occam's razor, Ockham's razor, or Ocham's razor ( la, novacula Occami), also known as the principle of parsimony or the law of parsimony ( la, lex parsimoniae), is the problem-solving principle that "entities should not be multiplied beyond neces ...
,
Morgan's Canon Morgan's Canon, also known as Lloyd Morgan's Canon, Morgan's Canon of Interpretation or the principle or law of parsimony, is a fundamental precept of comparative (animal) psychology, coined by 19th-century British psychologist C. Lloyd Morgan. In ...
and
explanatory power Explanatory power is the ability of a hypothesis or theory to explain the subject matter effectively to which it pertains. Its opposite is ''explanatory impotence''. In the past, various criteria or measures for explanatory power have been prop ...
, as well as the degree to which their
prediction A prediction (Latin ''præ-'', "before," and ''dicere'', "to say"), or forecast, is a statement about a future event or data. They are often, but not always, based upon experience or knowledge. There is no universal agreement about the exact ...
s match
experiment An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into Causality, cause-and-effect by demonstrating what outcome oc ...
al results. Skepticism in general may be deemed part of the
scientific method The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries; see the article history of scientific m ...
; for instance an experimental result is not regarded as established until it can be shown to be repeatable independently. The Sci.Skeptic FAQ characterizes the skeptic spectrum as divided into "wet" and "dry" sceptics, primarily based on the level of engagement with those promoting claims that appear to be pseudoscience; the dry skeptics preferring to debunk and ridicule, in order to avoid giving attention and thus credence to the promoters, and the "wet" skeptics, preferring slower and more considered engagement, in order to avoid appearing sloppy and ill-considered and thus similar to the groups all skeptics opposed. Ron Lindsay has argued that while some non-scientific claims appear to be harmless or "soft targets", it is important to continue to address them and the underlying habits of thought that lead to them so that we do not "have a lot more people believing that 9/11 was an inside job, that climate change is a hoax, that our government is controlled by aliens, and so forth—and those beliefs are far from harmless".


Skeptical movement

With regard to the skeptical social movement,
Daniel Loxton Daniel Loxton (born 1975) is a Canadian writer, illustrator, and skeptic. He wrote or co-wrote several books including ''Tales of Prehistoric Life,'' a children's science trilogy, and '' Abominable Science!'', a scientific look at cryptozoology. A ...
refers to other movements already promoting "humanism, atheism, rationalism, science education and even critical thinking" beforehand. He saw the demand for the new movement—a movement of people called "skeptics"—as based on a lack of interest by the scientific community to address paranormal and fringe-science claims. In line with
Kendrick Frazier Kendrick Crosby Frazier (March 19, 1942 – November 7, 2022) was an American science writer and longtime editor of ''Skeptical Inquirer'' magazine. He was also a former editor of '' Science News'', author or editor of ten books, and a Fellow of ...
, he describes the movement as a surrogate in that area for institutional science. The movement set up a distinct field of study, and provided an organizational structure, while "the long-standing genre of individual skeptical writing" lacked such a community and background. Skeptical organizations typically tend to have science education and promotion among their goals. The skeptical movement has had issues with allegations of sexism.
Mary Coulman Mary may refer to: People * Mary (name), a feminine given name (includes a list of people with the name) Religious contexts * New Testament people named Mary, overview article linking to many of those below * Mary, mother of Jesus, also calle ...
identified a disparity between women and men in the movement in a 1985 skeptic newsletter. The skeptic movement has generally been made up of men; at a 1987 conference the members there discussed the fact that the attendees were predominantly older white men and a 1991 listing of 50 CSICOP fellows included four women. Following a 2011 conference,
Rebecca Watson Rebecca Watson is an American blogger and podcast host. She is the founder of the blog ''Skepchick'' and former co-host of ''The Skeptics' Guide to the Universe'' podcast. She also previously co-hosted the ''Little Atoms'' podcast. Career Wat ...
, a prominent skeptic, raised issues of the way female skeptics are targeted with
online harassment Cyberbullying or cyberharassment is a form of bullying or harassment using electronic means. Cyberbullying and cyberharassment are also known as online bullying. It has become increasingly common, especially among teenagers, as the digital s ...
including threats of sexual violence by opponents of the movement, and also raised issues of sexism within the movement itself. While she received some support in response to her discussion of sexism within the movement, she later became a target of virulent online harassment, even from fellow skeptics, after posting an online video that discussed her discomfort with being propositioned in a confined space. This became known as "
Elevatorgate Rebecca Watson is an American blogger and podcast host. She is the founder of the blog ''Skepchick'' and former co-host of ''The Skeptics' Guide to the Universe'' podcast. She also previously co-hosted the ''Little Atoms'' podcast. Career Wat ...
", based on Watson's discussion about being propositioned in a hotel elevator in the early morning after a skeptic event.


Debunking and rational inquiry

The verb "to debunk" is used to describe efforts by skeptics to expose or discredit claims believed to be false, exaggerated, or pretentious. It is closely associated with skeptical investigation or rational inquiry of controversial topics (compare
list of topics characterized as pseudoscience This is a list of topics that have, either currently or in the past, been characterized as pseudoscience by academics or researchers. Detailed discussion of these topics may be found on their main pages. These characterizations were made in the ...
) such as U.F.O.s, claimed
paranormal Paranormal events are purported phenomena described in popular culture, folk, and other non-scientific bodies of knowledge, whose existence within these contexts is described as being beyond the scope of normal scientific understanding. Nota ...
phenomena,
cryptid Cryptids are animals that cryptozoologists believe may exist somewhere in the wild, but are not believed to exist by mainstream science. Cryptozoology is a pseudoscience, which primarily looks at anecdotal stories, and other claims rejected by ...
s,
conspiracy theories A conspiracy theory is an explanation for an event or situation that invokes a conspiracy by sinister and powerful groups, often political in motivation, when other explanations are more probable.Additional sources: * * * * The term has a nega ...
,
alternative medicine Alternative medicine is any practice that aims to achieve the healing effects of medicine despite lacking biological plausibility, testability, repeatability, or evidence from clinical trials. Complementary medicine (CM), complementary and alt ...
,
religion Religion is usually defined as a social- cultural system of designated behaviors and practices, morals, beliefs, worldviews, texts, sanctified places, prophecies, ethics, or organizations, that generally relates humanity to supernatural, ...
, or exploratory or
fringe Fringe may refer to: Arts * Edinburgh Festival Fringe, the world's largest arts festival, known as "the Fringe" * Adelaide Fringe, the world's second-largest annual arts festival * Fringe theatre, a name for alternative theatre * The Fringe, the ...
areas of scientific or
pseudoscientific Pseudoscience consists of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method. Pseudoscience is often characterized by contradictory, exaggerated or unfalsifiable claim ...
research. "to expose or excoriate (a claim, assertion, sentiment, etc.) as being pretentious, false, or exaggerated: to debunk advertising slogans." Further topics that scientifically skeptical literature questions include health claims surrounding certain foods, procedures, and
alternative medicine Alternative medicine is any practice that aims to achieve the healing effects of medicine despite lacking biological plausibility, testability, repeatability, or evidence from clinical trials. Complementary medicine (CM), complementary and alt ...
s; the plausibility and existence of
supernatural Supernatural refers to phenomena or entities that are beyond the laws of nature. The term is derived from Medieval Latin , from Latin (above, beyond, or outside of) + (nature) Though the corollary term "nature", has had multiple meanings si ...
abilities (e.g.
tarot reading Tarot card reading is a form of cartomancy whereby practitioners use tarot cards to purportedly gain insight into the past, present or future. They formulate a question, then draw cards to interpret them for this end. A traditional tarot deck con ...
) or entities (e.g.
poltergeists In ghostlore, a poltergeist ( or ; German for "rumbling ghost" or "noisy spirit") is a type of ghost or spirit that is responsible for physical disturbances, such as loud noises and objects being moved or destroyed. Most claims or fictional descr ...
,
angels In various theistic religious traditions an angel is a supernatural spiritual being who serves God. Abrahamic religions often depict angels as benevolent celestial intermediaries between God (or Heaven) and humanity. Other roles include ...
,
gods A deity or god is a supernatural being who is considered divine or sacred. The ''Oxford Dictionary of English'' defines deity as a god or goddess, or anything revered as divine. C. Scott Littleton defines a deity as "a being with powers greater ...
—including
Zeus Zeus or , , ; grc, Δῐός, ''Diós'', label=Genitive case, genitive Aeolic Greek, Boeotian Aeolic and Doric Greek#Laconian, Laconian grc-dor, Δεύς, Deús ; grc, Δέος, ''Déos'', label=Genitive case, genitive el, Δίας, ''D ...
); the monsters of
cryptozoology Cryptozoology is a pseudoscience and subculture that searches for and studies unknown, legendary, or extinct animals whose present existence is disputed or unsubstantiated, particularly those popular in folklore, such as Bigfoot, the Loch Ness ...
(e.g. the
Loch Ness monster The Loch Ness Monster ( gd, Uilebheist Loch Nis), affectionately known as Nessie, is a creature in Scottish folklore that is said to inhabit Loch Ness in the Scottish Highlands. It is often described as large, long-necked, and with one or mor ...
); as well as
creationism Creationism is the religious belief that nature, and aspects such as the universe, Earth, life, and humans, originated with supernatural acts of divine creation. Gunn 2004, p. 9, "The ''Concise Oxford Dictionary'' says that creationism is 't ...
/
intelligent design Intelligent design (ID) is a pseudoscientific argument for the existence of God, presented by its proponents as "an evidence-based scientific theory about life's origins". Numbers 2006, p. 373; " Dcaptured headlines for its bold attempt to ...
,
dowsing Dowsing is a type of divination employed in attempts to locate ground water, buried metals or ores, gemstones, oil, claimed radiations (radiesthesia),As translated from one preface of the Kassel experiments, "roughly 10,000 active dowsers in Ge ...
,
conspiracy theories A conspiracy theory is an explanation for an event or situation that invokes a conspiracy by sinister and powerful groups, often political in motivation, when other explanations are more probable.Additional sources: * * * * The term has a nega ...
, and other claims the skeptic sees as unlikely to be true on scientific grounds. Skeptics such as
James Randi James Randi (born Randall James Hamilton Zwinge; August 7, 1928 – October 20, 2020) was a Canadian-American stage magician, author and scientific skeptic who extensively challenged paranormal and pseudoscientific claims. Rodrigues 2010p. ...
have become famous for
debunking {{Short pages monitor