Stathis Papaioannou wrote:
> 2009/1/6 Abram Demski <abramdem...@gmail.com>:
>> If time is merely an additional space dimension, why do we experience
>> "moving" in it always and only in one direction? Why do we remember
>> the past and not the future? Could a being move in some spatial
>> dimension in the same way we move through time, and in doing so treat
>> time more like we treat space? Et cetera.
> You could model a block universe as a big stack of Life boards, where
> the time dimension is represented by the spatial displacement between
> the boards. There's no way the observers in such an arrangement can
> step out of one board onto another, backwards or out of sequence. Some
> would say that the stack of boards does not count as a computation,
> and others that even if it counts as a computation it doesn't count as
> a conscious computation; that to reach such states you need causality
> and for causality you need fundamentally real time, not block
> pseudo-time. I don't see any justification for such claims beyond a
> desire to preserve the magic in the world.
If you don't require causality or something else that provides a continuum
topology then the boards can be infinitesimally thin and without any intrinsic
order. That would mean that a single "board", by itself (a "state" in machine
terminology) would have to count as a computation. That's why Bruno insists on
a digital structure, but even in his model there is the UD running in the
background and providing an order.
You received this message because you are subscribed to the Google Groups
"Everything List" group.
To post to this group, send email to everything-l...@googlegroups.com
To unsubscribe from this group, send email to
For more options, visit this group at