As proof of its intrinsic analogic structure a link, unlike writing, cannot in itself negate, it cannot say "not," in much the same way that an image cannot of itself state a negative. It can only provide connection and in so doing establish homology or dissonance, similarity or contradistinction. This, rather crudely, is what I take to be the import of Stafford's argument in her "Visual Analogy: Consciousness as the Art of Connecting."