One of the new advances in theories of the mind is that the conscious mind does not really exist. Everything we do is based in the unconscious. An example is that it appears that before we consciously think about eating a cookie the muscles in our body have already begun the process of making that happen.

(The Great Courses – Science in the Twentieth Century: A Social-Intellectual Survey)

In Medieval times the queen in the game of chess could only move one space at a time.

(The Great Courses – The Other Side of History)