There is something about the notion of mistaken identity...
There is something about the notion of mistaken identity that captures the imagination, especially in literature. Consider how many novels and plays deal with this concept: the identity confusion in Sophocles' Oedipus Rex, the twins in Shakespeare's Comedy of Errors or in Mark Twain's Pudd'nhead Wilson, or the mistaken identity in Twain's The Prince and the Pauper and Nikolai Gogol's The Government Inspector, and so on. Establishing one's true identity is apparently a source of great drama, comedy, and even tragedy.