The main source of the problem in "Twelfth Night" is mistaken identity. How has this led to great confusion in the play?
Confusion due to mistaken identity runs throughout the play. It starts with, and often returns to, confusion over Viola. To protect herself, she disguises herself as a man ( Cesario). The result is that she is now given the Duke's confidences about love. She gets to hear the male perspective on love, something a woman in the period might not. When Viola is set to Olivia's with a message, Olivia falls in love with her, precisely because she (Olivia) thinks she (Viola) is a man. Whew! Even that first go round is confusing just to say, and that's just the start. In general, the confusion revolves around love (and money, to a lesser degree).