Donald Rumsfeld

The Jolly Contrarian’s Glossary The snippy guide to financial services lingo.™ Go Premium There are five types of known. The Rumsfeld three: Known knowns: Things you do know you know; Known unknowns: Things you do know you don’t know; Unknown unknowns: Things you don’t know you don’t know; And the Jolly Contrarian three: Unknown knowns: Things you don’t know you do know. Not officially known: Things you know but the general public can’t prove. Knowable unknowns: Things you don’t know, but think you do know, for the time being, because computers. Index — Click the ᐅ to expand: Glossary Comments? Questions? Suggestions? Requests? Insults? We’d love to 📧 hear from you. Sign up for our newsletter.

United States Secretary of Defense Donald Henry Rumsfeld, most famous in these pages for Rumsfeld’s taxonomy of knowns and unknowns.

See also

• Unknowns