Richard Wollheim
According to Richard Wollheim, what is distinctive about representational seeing is that we "see-in" to the painting. We simultaneously see the marked surface and the subject. Can you find an example of (a) a painting which does not give rise to an experience of "twofoldness" (e.g. one can see the subject but not the marked surface) or (b) a painting that gives rise to an experience of twofoldness, but is not representational?