I would not deny causality in such a universe so long as the logical
structure enforces the Life rules (meaning, the next level in the
stack is *always* the next life-tick, it couldn't be something else...
which is true by supposition in the block world).

Perhaps that still counts as a magical requirement for you, though.


On Tue, Jan 6, 2009 at 8:07 AM, Stathis Papaioannou <> wrote:
> 2009/1/6 Abram Demski <>:
>> Thomas,
>> 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.
> --
> Stathis Papaioannou
> >

Abram Demski
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