I think life is a test that everyone has to take individually. Nobody else exists (well obviously they do as in the sense that we can see them, there brains are programmed to do certain things and there whole life is planned out by god or something else and everyday is planned out like a script, and your decisions determine what will happen next, nobody else is real, you might argue that pain is real and other people can feel pain? how do we know other people can physically feel pain we cannot feel there physicall pain, it could be an act or cover up as to not reveal the true meaning of life which is a test.