I don’t always agree with his politics, but this quote was a revelation to me. As a manager, I’m always looking for the unknown unknowns. Otherwise know ln as unintended consequences.
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