# negation as failure

> non-monotonic inference rule implying that the impossibility to derive a statement allows to infer its negation

**Wikidata**: [Q2119400](https://www.wikidata.org/wiki/Q2119400)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Negation_as_failure)  
**Source**: https://4ort.xyz/entity/negation-as-failure


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)