Bringing competing philosophical views together in a critical discussion

The film Abre Los Ojos ends after Cesar decides to wake up from his dream. We do not get to see what happens after he is told, "Open your eyes", but suppose that he wants to know whether he is still dreaming. Chisholm might explain Cesar's situation as an example of the 'Problem of the Criterion'. Explain how Cesar's case illustrates this problem, and how the three responses to the problem discussed by Chisholm might relate to the film. Your discussion should address the following: - What is the Problem of the Criterion, and how is it relevant to Cesar's predicament at the end of the film? -What are the three different responses to the problem that Chisholm describes. and might each attempt to answer the question.