As I look at a horse coming slowly towards me I am presented, in experience, with that elegant animal. Yet seeing something face to face is not the only way for it to appear to us. I may look at a black and white pho-t ograph of a horse by the sea, observe Whistler’s vivid painting, dream that I am edging ahead at the Grand National, or simply visualize a stallion with its thick hair caressed by the light wind. Looking at pictures, having a dream or just imagining something are all phenomena too ordinary for any theory of human experience to attempt to analyse. A proper analysis of such phenomena, though, encounters a serious puzzle: how is it possible that we are presented with something that is not physically present?