Re: being inside a universe

2002-07-08 Thread Bruno Marchal
At 9:33 -0700 5/07/2002, Wei Dai wrote: On Thu, Jul 04, 2002 at 04:07:42PM +0200, Bruno Marchal wrote: [Hal Finney wrote:] In general, universes are created by more than one computer program. The measure of a universe is proportional to the number of computer programs which create it.

Re: being inside a universe

2002-07-08 Thread Bruno Marchal
Tim May wrote: I've known of the Everything list, and of course the Everett/DeWitt/Niven/Wheeler/Egan/Tegmark ideas for a while...I remember reading Larry Niven's All the Myriad Ways around 1970 or so. We used to sit around in the early 70s debating the Everett model, which a couple of

Which universe are we in?

2002-07-08 Thread Tim May
I want to give a solid example of a time-varying set and how it relates to possible worlds (and even to MWI). Consider that cat being chased by the dog. Is the cat in the world in which he will escape the dog or is in the world in which the dog catches him? One answer is That lies in the

Re: Which universe are we in?

2002-07-08 Thread Hal Finney
Tim May writes: I want to give a solid example of a time-varying set and how it relates to possible worlds (and even to MWI). Consider that cat being chased by the dog. Is the cat in the world in which he will escape the dog or is in the world in which the dog catches him? ... In the

Re: Which universe are we in?

2002-07-08 Thread Tim May
On Monday, July 8, 2002, at 03:40 PM, Hal Finney wrote: Future uncertainty is familiar to us, but one of the things that the many universe model introduces is past uncertainty. There is a sense in which the past is not unique and determined. My mental state is consistent with many

Re: Which universe are we in?

2002-07-08 Thread Christopher Maloney
Hi all -- it's been a long time since I've participated in this group. I've been lurking for a few days, and am very pleased with the quality of the posts that I've read! It's good to see that this discussion continues! Some comments below. Tim May wrote: On Monday, July 8, 2002, at 03:40

Re: Which universe are we in?

2002-07-08 Thread Stephen Paul King
Dear Tim, Are you tacitly assuming some kind of communication between observers when you make the claim of a convergence? Adsent said communications, could we show that the convergence would still obtain? Have you ever seen any discussion of the notion of cyclic or periodic gossiping in Comp

Re: Which universe are we in?

2002-07-08 Thread George Levy
Hal Finney wrote: [EMAIL PROTECTED]"> Future uncertainty is familiar to us, but one of the things that the many universe model introduces is past uncertainty. There is a sense in which the past is not unique and determined. My mental state is consistent with many macroscopically distinct

Re: being inside a universe

2002-07-08 Thread Wei Dai
Bruno, unfortunately I'm not able to write very quickly. I hope you don't mind if I just respond to some of the topics I think are most important. Feel free to recall the other ones later if you think I'm missing something crucial. On Mon, Jul 08, 2002 at 05:22:11PM +0200, Bruno Marchal wrote: