# Re: UDA last question (was UDA step 9 10).

```Questions 1) and 1a) have been answered in this article:

http://xxx.lanl.gov/abs/math-ph/0008018```
```
Saibal

Joel wrote:

> Bruno and fellow Everythingers...
>
> Sorry I've been disconnected for a while.  I think Bruno's last message
has
> really helped me to understand the Universal Dovetailer.
>
> > Some of those computations will generate the 3-states corresponding
> > to my "preparing coffe 1-state". Because we accept comp. Now if I
> > prepare a cup of coffee, my brain will go through a sequence of
> > states (third person describable computational state, at the right
> > level of description of myself). and I have pick one of those
> > state---like in a duplication experiment).
> >
> > So the UD generates that state eventually (by going through a
> > computation which emulates my doing or dreaming of doing that cup of
> > coffe).
>
> So the Universal Dovetailer simply enumerates all possible states for
"me".
> (Whatever "me" is, is unimportant).  And somehow, these states are joined
by
> their similarity to one another, which allows (virtual) motion from one
> state to the next.
>
> So, if I am currently sitting in the state of "sitting at my desk", I have
> several realities branching off from this one where in the next moments I
am
> "rising from my chair", or "still sitting at my desk", or "petting a white
> rabbit".
>
> But I am left with one nagging question:
>
> 1) Where is Time?
>
> 1a) What governs the trajectory of one's awareness through all his/her
> possible states?
>
> 1b) What defines the current state?
>
> 1c) How do I get from one state to another?
>
> 1d) Isn't this "awareness", and its motion path necessarily "outside"
those
> states and the Universal Dovetailer?
>
> Since I am into cellular automata, I always assumed that time is
implemented
> naturally... by the automaton... from one tick to the next - just like a
> movie.
>
> Can we really assume UD* exists?  Doesn't it take Time to execute UD?
>
> Joel
>
>
>

```