quote · Legacy record
There are known knowns, things we know that we know; and there are known unknowns, things that we know we don't know. But there are also unknown unknowns, things we do not know we don't know.
There are known knowns, things we know that we know; and there are known unknowns, things that we know we don't know. But there are also unknown unknowns, things we do not know we don't know.
Historical period not yet established
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Begin with source-checked readings and explanations ↗Attribution & collection notes
- Author or tradition
- Donald Rumsfeld
Attribution: attributed - Country attributed
- Not established
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- Historical period not yet established
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- Contributor-provided quotation collection
Supplied reference C; CSV row 188362; supplied attribution, independently unverified
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