Logic programming

Open-world assumption

In a formal system of logic used for knowledge representation, the open-world assumption is the assumption that the truth value of a statement may be true irrespective of whether or not it is known to be true. It is the opposite of the closed-world assumption, which holds that any statement that is true is also known to be true. (Wikipedia).

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Related pages

Mathematical logic | Database transaction | Truth value | Monotonicity of entailment | Web Ontology Language | Stable model semantics | First-order logic | Closed-world assumption