If novelists truly wanted to simulate the delta of lfe's possibilities, this is what they'd do. At the back of the book would be a set of sealed envelopes in various colours. Each would be clearly marked on the outside: Traditional Happy Ending; Traditional Unhappy Ending; Traditional Half-and-Half Ending; Deus ex Machina; Modernist Arbitrary Ending; End of the World Ending; Cliffhanger Ending; Dream Ending; Opaque Ending; Surrealist Ending; and so on. You would be allowed only one, and would have to destroy the envelopes you didn't select.