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For other uses, see Error (disambiguation).

The word error entails different meanings and usages relative to how it is conceptually applied. The concrete meaning of the Latin word "error" is "wandering" or "straying". Unlike an illusion, an error or a mistake can sometimes be dispelled through knowledge (knowing that one is looking at a mirage and not at real water does not make the mirage disappear). For example, a person who uses too much of an ingredient in a recipe and has a failed product can learn the right amount to use and avoid repeating the mistake. However, some errors can occur even when individuals have the required knowledge to perform a task correctly. Examples include forgetting to collect change after buying chocolate from a vending machine, forgetting the original document after making photocopies, and forgetting to turn the gas off after cooking a meal. Some errors occur when an individual is distracted by something else.

Human behavior[edit]

One error and its catastrophic results: Napoleon's retreat from Moscow, painted by Adolph Northen in the 19th century

One reference differentiates between "error" and "mistake" as follows:

An 'error' is a deviation from accuracy or correctness. A 'mistake' is an error caused by a fault: the fault being misjudgment, carelessness, or forgetfulness. Now, say that I run a stop sign because I was in a hurry, and wasn't concentrating, and the police stop me, that is a mistake. If, however, I try to park in an area with conflicting signs, and I get a ticket because I was incorrect on my interpretation of what the signs meant, that would be an error. The first time it would be an error. The second time it would be a mistake since I should have known better.[1]

In human behavior the norms or expectations for behavior or its consequences can be derived from the intention of the actor or from the expectations of other individuals or from a social grouping or from social norms. (See deviance.) Gaffes and faux pas can be labels for certain instances of this kind of error. More serious departures from social norms carry labels such as misbehavior and labels from the legal system, such as misdemeanor and crime. Departures from norms connected to religion can have other labels, such as sin.

Oral and written language[edit]

An individual language user's deviations from standard language norms in grammar, syntax, pronunciation and punctuation are sometimes referred to as errors. However in light of the role of language usage in everyday social class distinctions, many feel that linguistics should be descriptive rather than prescriptive to avoid reinforcing dominant class value judgments about what linguistic forms should and should not be used. One may distinguish various kinds of linguistic errors[2] – some, such as aphasia or speech disorders, where the user is unable to say what they intend to, are generally considered errors, while cases where natural, intended speech is non-standard (as in dialects), are considered correct speech in descriptive linguistics, but errors in prescriptive linguistics. See also Error analysis.

Herzliya Airport (Israel) runway location and traffic pattern chart (left) was erroneously printed as a result of "black layer" 180° misplacement. The corrected chart is on the right.
The 'Judas' Bible in St Mary's Church, Totnes, Devon. This edition is known as the 'Judas' Bible because in Matthew c26 v36 'Judas' appears instead of 'Jesus'. In this copy the mistake is corrected with a slip of paper pasted over the misprint.[3]

Gaffe [edit]

A gaffe is a verbal mistake, usually made in a social environment. The mistake may come from saying something that is true, but inappropriate. It may also be an erroneous attempt to reveal a truth. Finally, gaffes can be malapropisms, grammatical errors or other verbal and gestural weaknesses or revelations through body language. Actually revealing factual or social truth through words or body language, however, can commonly result in embarrassment or, when the gaffe has negative connotations, friction between people involved.

Philosophers and psychologists interested in the nature of the gaffe include Freud and Gilles Deleuze. Deleuze, in his Logic of Sense, places the gaffe in a developmental process that can culminate in stuttering.

As used by some journalists, particularly sportswriters, "gaffe" becomes an imagined synonym for any kind of mistake, e.g., a dropped ball by a player in a baseball game.


See medical error for a description of error in medicine.

Science and engineering[edit]

Erroneous traffic sign in Israel. The correct sign is depicted on the lower-right corner.

In statistics, an error (or residual) is not a "mistake" but rather a difference between a computed, estimated, or measured value and the accepted true, specified, or theoretically correct value.

In science and engineering in general an error is defined as a difference between the desired and actual performance or behavior of a system or object. This definition is the basis of operation for many types of Control systems, in which error is defined as the difference between a set point and the process value. An example of this would be the thermostat in a home heating system—the operation of the heating equipment is controlled by the difference (the error) between the thermostat setting and the sensed air temperature. Another approach is related to considering a scientific hypothesis as true or false, giving birth to two types or errors: Type 1 and Type 2. The first one is when a true hypothesis is considered false, while the second is the reverse (a false one is considered true).

Engineers seek to design devices, machines and systems and in such a way as to mitigate or preferably avoid the effects of error, whether unintentional or not. Such errors in a system can be latent design errors that may go unnoticed for years, until the right set of circumstances arises that cause them to become active. Other errors in engineered systems can arise due to human error, which includes cognitive bias. Human factors engineering is often applied to designs in an attempt to minimize this type of error by making systems more forgiving or error-tolerant.

(In computational mechanics, when solving a system such as Ax = b there is a distinction between the "error" — the inaccuracy in x — and residual—the inaccuracy in Ax.)

Numerical analysis[edit]

Numerical analysis provides a variety of techniques to compute approximations to mathematical numerical values. Errors arise from a trade-off between efficiency and precision, which is limited anyway, since (using floating-point arithmetic) only some rational numbers can be represented exactly. The discrepancy between the exact mathematical value and the computed value is called the approximation error.


The word cybernetics stems from the Greek Κυβερνήτης (kybernētēs, steersman, governor, pilot, or rudder — the same root as government). In applying corrections to the trajectory or course being steered cybernetics can be seen as the most general approach to error and its correction for the achievement of any goal. The term was suggested by Norbert Wiener to describe a new science of control and information in the animal and the machine. Wiener's early work was on noise.

The cybernetician Gordon Pask held that the error that drives a servomechanism can be seen as a difference between a pair of analogous concepts in a servomechanism: the current state and the goal state. Later he suggested error can also be seen as an innovation or a contradiction depending on the context and perspective of interacting (observer) participants. The founder of management cybernetics, Stafford Beer, applied these ideas most notably in his Viable System Model.


Main article: mutation

In biology, an error is said to occur when perfect fidelity is lost in the copying of information. For example, in an asexually reproducing species, an error (or mutation) has occurred for each DNA nucleotide that differs between the child and the parent. Many of these mutations can be harmful, but unlike other types of errors, some are neutral or even beneficial. Mutations are an important force driving evolution. Mutations that make organisms more adapted to their environment increase in the population through natural selection as organisms with favorable mutations have more offspring.


In philately, an error refers to a postage stamp or piece of postal stationery that exhibits a printing or production mistake that differentiates it from a normal specimen or from the intended result. Examples are stamps printed in the wrong color or missing one or more colors, printed with a vignette inverted in relation to its frame, produced without any perforations on one or more sides when the normal stamps are perforated, or printed on the wrong type of paper. Legitimate errors must always be produced and sold unintentionally. Such errors may or may not be scarce or rare. A design error may refer to a mistake in the design of the stamp, such as a mislabeled subject, even if there are no printing or production mistakes.


Main article: Error (law)

In appellate review, error typically refers to mistakes made by a trial court or some other court of first instance in applying the law in a particular legal case. This may involve such mistakes as improper admission of evidence, inappropriate instructions to the jury, or applying the wrong standard of proof.

Governmental policy[edit]

Within United States government intelligence agencies, such as Central Intelligence Agency agencies, error refers to intelligence error, as previous assumptions that used to exist at a senior intelligence level within senior intelligence agencies, but has since been disproven, and is sometimes eventually listed as unclassified, and therefore more available to the American public and citizenry of the United States. The Freedom of information act provides American citizenry with a means to read intelligence reports that were mired in error. Per United States Central Intelligence Agency's website (as of August, 2008) intelligence error is described as:

"Intelligence errors are factual inaccuracies in analysis resulting from poor or missing data; intelligence failure is systemic organizational surprise resulting from incorrect, missing, discarded, or inadequate hypotheses."[4]


In numismatics, an error refers to a coin or medal that has a minting mistake, similar to errors found in philately. Because the U.S. Bureau of the Mint keeps a careful eye on all potential errors, errors on U.S. coins are very few and usually very scarce. Examples of numismatic errors: extra metal attached to a coin, a clipped coin caused by the coin stamp machine stamping a second coin too early, double stamping of a coin. A coin that has been overdated, e.g.: 1942/41, is considered an error.I.

See also[edit]

Psychology of error
Error in reasoning
Errors in language
Errors on the Web
Error diagnosis, correction and prevention
Production quality terminology


  1. ^ Robinson, P. "In the Matter of:The Gatekeeper: The Gate Contracts"
  2. ^ Mistakes, Arnold Zwicky, 1980, Advocate Publishing Group, ISBN 0-89894-030-5
  3. ^ According to a note in St Mary's Church, Totnes, Cornwall, UK
  4. ^ United States Central Intelligence Agency. Analytic Culture in the U.S. Intelligence Community. Retrieved August 30, 2008.

External links[edit]

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Fri, 22 Aug 2014 22:00:29 -0700

Dan Haren overcame a leadoff homer by Curtis Granderson and a pair of failed sacrifice bunt attempts to help the Los Angeles Dodgers beat the error-prone New York Mets 6-2 on Friday night. Haren (11-10) allowed a run and three hits in seven innings, ...


Washington Post
Thu, 21 Aug 2014 16:30:41 -0700

By the bottom of the ninth Thursday afternoon, rain had stopped dripping from the steel-gray sky above Nationals Park, and the Washington Nationals had turned a harebrained daydream into vivid possibility. Denard Span ambled back to first base after ...
Fri, 22 Aug 2014 14:56:15 -0700

INDIANAPOLIS (WISH) – An internal affairs investigation is underway into what the Marion County Sheriff's Office calls a “possible transportation error” involving two inmates. Both inmates were released Tuesday, but placed back into custody Friday ...


Fri, 22 Aug 2014 22:15:00 -0700

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Daily Mail

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Fri, 22 Aug 2014 17:12:56 -0700

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Thu, 21 Aug 2014 12:52:30 -0700

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