>>18
You have to change to have consciousness. Consciousness itself implies that new information changes your previous state (and new information is gained, maybe some older information is forgotten, and so on).
>>17
but how do universal dovetailer run without getting destroyed by other processes, Not sure what you mean by destroyed. In the (meta)physical example, UD is assumed to either run on a robust physical universe or exist as an object in arithmetical 'platonia'. Infering its existence involves a fairly long argument where one shows that consciousness can supervene on null physical activity, which is nonsense. Of course, if you believe in classical first order logic (arithmetical sentences being 'true' or 'false'), that alone would be sufficient to implement computation and support the abstract UD. For a more comprehensive view on this hypothesis read:
http://iridia.ulb.ac.be/~marchal/publications/SANE2004MARCHALAbstract.html
http://iridia.ulb.ac.be/~marchal/publications/CC&Q.pdf
http://groups.google.com/group/everything-list/msg/e422b8cef00b3aa6
I also think reading "Permutation City" would basically give you the same idea if you think about it hard enough, but the image you'd get would be less complete than that given by those papers. And some simpler thoughts on this:
http://lesswrong.com/lw/1zt/the_mathematical_universe_the_map_that_is_the/ http://lesswrong.com/lw/uk/beyond_the_reach_of_god/
or running another universal dovetailer (and thus ending up in a loop) ? said universal dovetailer must be then a system that can counter any situation, but how will it counter a copy of itself?
This appears a bit paradoxal if you don't consider that computation is universal by Church Turing Thesis, and that you only run a computation up to some finite amount of steps when you think about it(although non-halting computations do exist and are quite important, UD is one of them as well, but you can partially compute it).
UD can be thought of as a scheduler which each step adds a new process. It first starts at time 0 with only program 0, at time 1, it runs one instruction of program 0 and program 1, at time 2, it runs one instruction of program 0 and program 1 and program 2, and so on. Now the dovetailer itself would appear early on, let's say at step k, however at step k, you would only execute the first instruction of the dovetailer within the larger dovetailer, thus the computation is always finite. You may have infinities of recursive dovetailer instatiations within each other, but the object is finite at each step, so there's no contradiction, you can even implement it on a simple finite state machine like your computer, although you'll be limited by your memory and CPU time (thus you'll have to stop executing at some particular program).
While UD itself admits a small finite description, the full run-trace of the program is infinite and is typically marked as UD*
Of course, the full UD* trace itself is not an object which is computationally accessible (although it exists as a mathematical 'truth'), no more than a halting oracle would be. Actually, it's not hard to modify the UD to give you omega (Chaitin's constant), and UD* contains it (uncomputable).
ill just assume creating another UD or a system that can destroy the original UD are not conscious eksperiences then.
There is no destruction involved here. Mostly because in the end it turns out the UD is not materially existing (although given some robust multiverse, it could be), but it turns out that matter itself is something we infer to exist from the first-person shared experiences which appear as states in the UD. Note that you don't have to assume the UD existing, but it ends up being the simplest hypothesis possible, and if you refuse to accept it, some strange absurdities should be taken as true (consciousness supervening on null physical activity).