This was a joke SDS: newton-the-apocalypse-and-2060-ad and who knows where x/y ~ 2000/z is. but I do remember, it was written with pencil around 10 pages and I said 'Make sure Bill gets it' I believe I said previously many times : 'We can't predict the future (bifurcations), but we can understand our past. How much? Well, that depends on US '