Allan - My argument is pretty hand-wavey at this point. I would have to try to develop it in more detail to see if it really holds. Maybe if we ever have a subsequent thread to discuss QI, I will try to bring it forward at that time.

One point which has not been mentioned here, I don't think, is the corollary to QI, what is called Quantum Suicide. This is where you buy a lottery ticket, and set up a machine to monitor the results and instantly and painlessly kill you if you don't win. Then, if you find yourself alive afterwards, you will have won the lottery. So to believers in QI, this is a way of guaranteeing that you win the lottery.