Identity
How are we able do determine what something is, and distinguish that thing from others? Borges routinely plays with notions of what makes something unique, as exemplified in A Survey of the Works of Herbert Quain, the plot of which concerns Herbert Quain trying to write Cervantes' novel Don Quixote verbatim from his own life experiences. If two authors come to the same words in different ways, is the product the same or different?