seen. He peers through a peephole or peeks around the occluding edge of a corner. In opposition to this is the striving not to be seen by others, the need for privacy. Burrows, caves, huts, and houses afford not only shelter from wind, cold, and rain but also the state of being out of sight, or out of the "public eye."
The human habit of covering the body with clothing whenever one is in sight of others is a matter of hiding some skin surfaces but not others, depending on the conventions of the culture. To display the usually covered surfaces is improper or immodest. The providing of some information for the layout of these hidden surfaces, however, is the aim of skillful clothing designers. And the careful manipulation of the occluding edges of clothing with progressive revealing of skin is a form of the theatrical art called stripping.
The demonstration that reversible occlusion is a fact of visual perception has farreaching implications. It implies that an occluding edge is seen as such, that the persistence of a hidden surface is seen, and that the connection of the hidden with the unhidden is perceived. This awareness of what-is-behind, and of the togetherness of the far side and the near side of any object, puts many of the problems of psychology in a new light.
The doctrine that all awareness is memory except that of the present moment of time must be abandoned. So must the theory of depth perception. The importance of the fixed point of view in vision is reduced. But a new theory of orientation, of way- finding, and of place-learning in the environment becomes possible. And the puzzles of public knowledge, of egocentricity, and of privacy begin to be intelligible.