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Undecidable
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{{wiktionary|undecidable|undecidability}} '''Undecidable''' may refer to: * [[Undecidable problem]] in computer science and mathematical logic, a decision problem that no algorithm can decide, formalized as an undecidable language or undecidable set * "Undecidable", sometimes also used as a synonym of [[independence (mathematical logic)|independent]], something that can neither be proved nor disproved within a mathematical theory * [[Undecidable figure]], a two-dimensional drawing of something that cannot exist in 3d, such as appeared in some of the works of M. C. Escher ==See also== *[[Decidable (disambiguation)]] {{disambiguation}}
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