Carolyn: The artist Marc Quinn has displayed, behind a glass plate, biologically replicated fragments of Sir John Sulston' s DNA, calling it a conceptual portrait of Sulston. But to be a portrait, something must bear a recognizable resemblance to its subject. Arnold: I disagree. Quinn' s conceptual portrait is a maximally realistic portrait, for it holds actual instructions according to which Sulston was created.
The statement 'The object described by Quinn as a conceptual portrait of Sir John Sulston contains instructions according to which Sulston was created' provides most support for the claim that Carolyn and Arnold disagree over the object described by Quinn.