"There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know"

- Donald Rumsfeld

About the Author

This quote is written / told by Donald Rumsfeld somewhere between July 9, 1932 and today. He/she was a famous Politician from USA. The author also have 58 other quotes. Go to author profile