In a major contribution to the theory of perception, A. D. Smith presents a truly original defense of direct realism--the view that in perception we are directly aware of things in the physical world.

The Problem of Perception offers two arguments against direct realism--one concerning illusion, and one concerning hallucination--that no current theory of perception can adequately rebut. Smith then develops a theory of perception that does succeed in answering these arguments; and because these arguments are the only two that present direct realism with serious problems...