Just thinking, whilst replying to Matt's Matrix-related email, that the more you think about all aspects of the films, the more you can create for yourself all manner of meanings. Maybe that's the point. As that could be what humanity has done in real life anyway, in creating all of it's belief systems and superstitions, let alone creating non-religious aspects of society around loose trains of thought. We've got a lot of space in our minds. Free will allows a lot of powerful thought. Given enough space we can dream up anything. Be anything. Ambiguity of reality. It's an evolutionary advantage.