This is an example of open shade:
It was taken at Whitby Gothic Weekend when the sun was directly overhead and there were no clouds. This produced a very harsh light and created very dark shadows under the nose and in this case her hat. I asked this young woman to step into the entrance to a covered alleyway: she was shielded from direct sunlight but there was plenty of sunlight being bounced around from the pavement and walls to light her. As you can see the light level drops off the further you head into the shade of the alley.