Le 10-nov.-05, à 05:45, Brian Scurfield a écrit  (for-list):

Bruno -

To summarise, the quantum theory of immortality arises from the
following considerations:

1. You cannot distinguish among all your identical first-person
observer moments.
2. From a first-person perspective, you cannot experience a dead
state, for death is no experience whatsoever.
3. The number of identical first-person moments is in aleph_1 (i.e.,
the continuum).
4. For every path that leads to your death, there is another path
where you remain alive (the no cul-de-sac conjecture)

OK. They are aleph_1 part (with the continuum hypothesis). The no
cul-de-sac conjecture is just the idea that the probabilities are defined by making abstraction of the dead-end or even of finite path leading to dead-end.

Therefore, from a first-person perspective, you are immortal!

Now, the argument is silent on the question of information flow. In
many scenarios, you remain alive because the local
thermodynamics "conspire" to remove you from a life-extinguishing
situation: There is no information flow.

I don't see why. From the first person perspective information grows by the measurment which selects alternative histories.

It has often been pointed
out on this list that universes are those parts of the multiverse
down which information flows. So Harry Potter "universes" are not in
fact universes.

What do you mean by "parts of the multiverse down which information flows"? Harry Potter universes are just improbable, and information grows to much there. It is almost like they got singularities in the amount of information. But death, well, really it is an open problem, because you must take into account the normal (statistical, based on the measure on the "observer/moment/states/worlds...") possible histories just going locally through exceptional states, I just get the math for beginning to state the problem, really, there could be jumps, and hard to state identity problems).

 It would seem, then, that the no cul-de-sac
conjecture needs to take into account information flow. Are there
always paths where you remain alive *down which information flows*?

I don't know. I'm not sure I understand the question. Perhaps you could elaborate a little bit and explain the expression "down which information flows".


Brian Scurfield.

--- In [EMAIL PROTECTED], Bruno Marchal

I believe that the quantum theory does not allow cul-de-sac
branches. I also believe that the Godel-Lob theory of self-
reference not only allow cul-de-sac branches, but it imposes them
everywhere: from all alive states you can reach a dead end.
The Universal Dovetailer Argument shows that the physics (which has
no dead ends) should be given by the self-reference logics (with
reachable dead end everywhere).
I have been stuck in that contradiction a very long time ...
... until I realized the absolute necessity of distinguishing the
first and third person point of views. That necessity is implied
itself by the incompleteness phenomena, but that is technical (ask
me on the everything-list if interested).
The intuitive point here is that you cannot have a first person
point of view on your own death: 1-death is not an event, and
should be kept out of the domain of verification of probabilistic
statements. Another intuition: the finite histories are of measure
null among the collection of all histories (the continuum).

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