# Rumsfeld matrix

> English word · Noun

## Definitions
1. A grid that divides risks into known knowns, known unknowns, unknown knowns, and unknown unknowns.

## Etymology
Named after Donald Rumsfeld.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/rumsfeld-matrix