Source: "To Be and Not To Be: The Comedy of Errors and Twelfth Night," in The Metamorphoses of Shakespearean Comedy, Princeton University Press, 1985, pp. 67-79.

[In the following excerpt, Carroll discusses haw Antipholus of Syracuse and Antipholus of Ephesus undergo "transformation by doubling," Antipholus of Syracuse enters a world (Ephesus) that is unfamiliar to him geographically, but the familiarity with which people greet and address him makes him wonder whether he's gone mad, is experiencing a dream, or whether Some external Ephesian force is at work. A ntipholus of Ephesus has a similar yet opposite experience- all that is familiar to him is now strange, which angers him and nearly drives him mad. Much of the confusion is due to the "transformations in everyday language" in their conversations with the Dromios and with Adriana and Luciana.]

. . . . The kind of experience Antipholus of Syracuse undergoes serves as a...