i. We humans will become extinct before we can develop into a 'posthuman' stage of civilisation.
ii. Any posthuman civilisation will have access to computer power so vast that time travel will be routine using computer-generated simulations of the past. (Bostrom calls these ancestor simulations ).
iii. That we are all living in one of these ancestor simulations.
With the potential advances of computer power offered by quantum computing such simulations are entirely possible. Bostrom suggests that the computing power available in a few million years will be so advanced that the human beings simulated in these programmes will be conscious!
Of course this idea is not absolutely original - the 1999 movie The Thirteenth Floor suggested something very similar. However Dr. Bostrum attempts to explain how such a circumstance could come about and is a very well respected academic. I am delighted to see that such ideas are now taken seriously.
So could it be that the 'designers' of my Bohmian IMAX may, in fact, be future software engineers?
Some of you, Ed in particular, have long suggested that consciousness works like a computer programme so could it be that the living of our lives over and over again is taking place in some super version of the computer game The Sims?