Garbage in, garbage out

Phrase used in computer science / From Wikipedia, the free encyclopedia

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In computer science, garbage in, garbage out (GIGO) is the concept that flawed, or nonsense (garbage) input data produces nonsense output. Rubbish in, rubbish out (RIRO) is an alternate wording.[1][2][3]

The principle applies to all logical argumentation: soundness implies validity, but validity does not imply soundness.