THE 3D WORLD HOWEVER THAT STICKMAN FIGURE HAS LIVED HIS ENTIRE LIFE GOING LEFT RIGHT UP AND DOWN HE DOESN'T KNOW WHAT PUSH OUT OF THE PAPER ACTUALLY MEANS AND LET'S SAY HE DOES PUSH OUT OF THE PAPER WE WOULDN'T BE ABLE TO SEE HIM HE WOULDN'T HAVE ANY DEPTH IN OUR 3D WORLD