Daily Archives: Monday, April 20, 2015

My Favorite No

Posted by & filed under Sparks, Video.

While not originally intended as a quote for teachers, Donald Rumsfeld once said, “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 […]