One of my favorite movie with one of my favorite director...
Gaspar Hauser...Is the movie title...
Reminds me of a Werner Herzog directed movie where in a boy never exposed to humans before arriving at a University were he was taken under the care of a professor who taught him language and introduced him to society. After some time when in a hall in the school, he asked the boy 'what was the biggest structure he had ever experienced'. The boy responded 'this room'. The professor told him this could not be as the room was just part of a much larger building. The boy responded that when outside the building he looked forward and there was the building, but when in the hall no matter where he looked all he saw was the hall!
Interesting. Unreal for sure, but for this boy, at his stage of development, this was 'real'. Laugh not, you may have been there. :-)