<theory> A problem with a yes/no answer. Determining whether some potential solution to a question is actually a solution or not. E.g. "Is 43669" a prime number?". This is in contrast to a "search problem" which must find a solution from scratch, e.g. "What is the millionth prime number?".
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Nearby terms: decidability « decidable « decimal point « decision problem » decision support » decision support database » Decision Support Systems