Subject: Re: Hawking, Penrose: Our universe, highly unlikely.
Date: Thu, 16 Aug 2001 14:07:15 -0700
From: "Brian Holtz" <Brian.Holtz@sun.com>
To: <brian.holtz@sun.com>

"JeffMo" <jeffmo@dipstick.cfw.com> wrote :
> "Brian Holtz" <Brian.Holtz@sun.com> wrote [to "Paul Filseth"]:
> >
> >it seems disingenuous
> >to instead invoke the simplistic physics of Life and its menagerie
> >of 2-D geometric critters like puffers and floaters, when a
> >Turing-on-Life organism would not be such a 2-D self-contained
> >pattern.
>
> Why not?

A Life puffer or glider is the only critter in a 2D rectangle
on the Life grid.  If you implemented an alife universe in a Turing
machine constructed on the Life grid, then the organisms inside that
alife universe would not be one-to-one with non-overlapping
2D rectangles on the Life grid.  And of course, the dimensions of
their world would not be the two dimensions of the Life grid, but
rather whatever dimensions were implemented in the alife universe.

--
Brian.Holtz@sun.com
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