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n. ~ 1. The process of determining truth or accuracy. - 2. A formal declaration, made before an authority such as a notary public, that statements in a document are true. - 3. Computing · The process of ensuring that data in backups, copies, or excerpts are identical to the data in the original files, that the data was not corrupted or lost during transfer.

(Dictionary of Computing 1996, p. 527) Verification3 and validation [is] a general term for the complete range of checks that are performed on a system in order to increase confidence that the system is suitable for its intended purpose. This range might include a rigorous set of functional tests, performance testing, reliability testing, and so on, in which case the term verification, validation and testing is more appropraite. Although a precise distinction is not always drawn, the verification aspects normally refers to completely objective checking of conforming to some well-defined specification, while the validation aspect normally refers to a somewhat objective assessment of likely suitability in the intended environment.
(Eco 1998, p. 19) There exists a process of verification1 that is based on slow, collective, public performance by what Charles Sanders Pierce called 'the Community.' It is thanks to human faith in the work of this community that we can say, with some serenity, that the Donation of Constantine was false, that the earth turns around the sun, and that Saint Thomas at least knew the planet is round.