There are known knowns, things we know that.... : Quote by Donald Rumsfeld

“ 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. ”

Donald Rumsfeld
  • From : Known and Unknown: A Memoir
  • Report, if you have a problem with this page