What do we know that we don't know we know?

The actor Joseph Gordon Leavitt has appeared in three films as a character struggling with knowledge which is is some way below the level of consciousness, Mysterious Skin (2004), Brick (2005) and The Lookout (2007). His face is remarkable for conveying both vulnerability and a sort of willed impermeability. All of the films are recommended.

It's a state I believe most of us have experienced.