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 > > >