  Currie explains that the heuristic path is the “way in which the artist arrived at the final product.” Neither a particular agent nor a specific time is essential to the action type that is the work of art: someone else could discover the same structure at a different time yet instantiate the same work. Currie conjectures, for example, that if “Picasso’s twin on ‘Twin Earth’ produces a canvas indistinguishable from Picasso’s Guernica, and if he does so in the same way, then Guernica and Twin Guernica are instances of the same work” (1989, 9). Currie also introduces a similar conjecture involving Beethoven, twin Beethoven, and twin tokens of the Hammerklavier sonata.