# There are unknown unknowns

> phrase by Donald Rumsfeld

**Wikidata**: [Q1261494](https://www.wikidata.org/wiki/Q1261494)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/There_are_unknown_unknowns)  
**Source**: https://4ort.xyz/entity/there-are-unknown-unknowns


## References

1. Freebase Data Dumps. 2013
2. BBC Things