 “Separating hard and white,” then, is treating mutually pervasive features as if they were separable or detachable, like two spatially distinct objects or two removable physical parts of a whole. (As Graham points out (2003: 173), in contexts where “hard and white” is mentioned alone, with no reference to “separating” the two, the phrase may simply be a metaphor for logic-chopping or hair-splitting debate in general.) A plausible example of “separating hard and white” is Gongsun Long’s treating the color of a white horse as a thing separable from the shape, as when the text reads, “The white is not the horse. A white horse is a horse together with white” (“White Horse Discourse”). 