On 29 Oct 2013, at 02:13, chris peck wrote:
Hi Jason
>> Right but when you refer to "the experience" or "chris peck's
experiences", that is speaking in the third person.
It should make no difference to your argument at all.
That makes the difference, because the prediction concerned the future
first person experience.
In fact Bruno's step 3 is written in the third person too.
All science is 3p. Even when the subject-matter is the 1p. Comp makes
that possible.
You're confusing how the set up is described with what is actually
thought by the protagonists. In fact let me use a paragraph from
Bruno's step 3 replacing the issues under debate, that way there can
be no confusion about the fact that I not mistaking a 1-p view for a
3-p view any more than he is.
Bruno's version (and take special note of the use of third person
descriptions):
Giving the built-in symmetry of this experiment, if asked before the
experiment about his personal future location, the experiencer must
confess he cannot predict with certainty the personal outcome of the
experiment. He is confronted to an unavoidable uncertainty. This is
remarkable because from a third person point of view the experiment
is completely deterministic, and indeed the mechanist doctrine is
defended most of the time by advocates of determinism. But we see
here that mechanism, by being indeed completely 3-deterministic,
entails a strong form of indeterminacy[10], bearing on the possible
consistent extensions, when they are observed by the first person,
as both diaries can witness. This is what I call the first person
comp indeterminacy, or just 1-indeterminacy. Giving that Moscow and
Washington are permutable without any noticeable changes for the
experiencer, it is reasonable to ascribe a probability of ½ to the
event “I will be in Moscow (resp. Washington).” Before proceeding
the experiencer is in a state of maximal ignorance.
Corrected version:
[Given]
OK.
the built-in symmetry of this experiment, if asked before the
experiment about his personal future location, the experiencer must
confess he [can] predict with certainty the personal outcome of the
experiment. He is confronted to an unavoidable [certainty]. This is
[unremarkable]
Of course remarkable/unremarkable is a bit subjective. But what is
remarkable is that a pure third person deterministic reality explained
a strong form of indeterminacy, by logic and arithmetic alone, without
invoking QM. Everett does that too, but needs to postulate QM. Here we
postulate mechanism only.
because from a third person point of view the experiment is
completely deterministic, and indeed the mechanist doctrine is
defended most of the time by advocates of determinism. But we see
here that mechanism, by being indeed completely 3-deterministic,
entails a strong form of [determinacy],
No. Of indeterminacy. Unless you can provide an algorithm of prediction.
bearing on the [certain] consistent extensions, when they are
observed by the first person, [regardless of what] both diaries can
witness. This is what I [shouldn't] call the first person comp
indeterminacy, or just 1-indeterminacy. [Regardless] that Moscow and
Washington are permutable without any noticeable changes for the
experiencer, it is reasonable to ascribe a probability of 100% to
the event “I will be in Moscow (resp. Washington).” [because] Before
proceeding the experiencer is in a state of maximal [knowledge].
The prediction "I will be in Moscow" cannot be 100%, as the guy
reconstituted in Washington will understand.
Both the guy in M and in W knows that 100% has to be excluded.
>> According to your usage, how is the meaning of "subjective
certainty" different from just "certainty"?
They are identical. Bruno argues that if everyone is certain or
uncertain of something then this certainty become 'objective' in
some sense.
I never did that. You misunderstood the point. I just explained that
some "uncertainty about 1p" can be communicated in a 3p way. It is the
fact that they are necessarily uncertain which makes them objective.
Comp and Everett provides examples.
Its an irrelevant point he makes but nevertheless it is wrong. Its a
confusion between solipsism and subjectivism. certainty and
uncertainty are predicates applicable only to subjects. 'I's. And no
matter how many people hold a belief or are certain or uncertain of
something those certainties / uncertainties are only ever subjective.
The uncertainty in lottery are objective, computable, and people makes
money on them. Boltzmann statistics are objective, obeys laws. You are
confusing the fact that we do have a subjective uncertainty related to
them, but the roots of the uncertainty can be mathematical, logical,
physical, etc.
>> After the duplication there are two experiencers. <--[notice the
third person description you're employing here!] Each is confronted
with the impossibility of being able to reliably predict which
experience they would next have following the duplication. The
knowledge that all experiences will be had does not eliminate this
uncertainty.
I keep pointing out that the question is asked prior to duplication
and you keep ignoring that.
That makes the point. prior to duplication, the subject is totally
ignorant of what he will feel after.
>> According to your usage, in which you have no uncertainty because
you know future chris pecks, following duplication, will
individually experience all possible outcomes, such certainty
ignores the personal feelings of the original Chris peck stepping
into the duplicator and experiencing himself becoming one of the
experiencers. Therefore it is not subjective in the sense that I use
subjective, in which I mean you should literally imagine what it
would be like to go into the duplicating chamber and be duplicated.
Imagining what it would be like to go into the duplicating chamber
from a first person perspective is precisely what I am doing. And
you can not ignore the fact that the experiencer will have a certain
set of beliefs as he goes in. Infact, it is axiomatic to Bruno's
reasoning that we assume the experiencer is a 'comp practitioner'
who would 'say yes' to the doctor. ie. it is axiomatic that the
experiencer has a very specific set of beliefs. If you don't take
these beliefs into account then *you* are not imagining what it
would be like to be the experiencer.
Jason said that.
So, when the question is asked, you are not about to see (Washington
or Moscow), you are about to see (Washington and Moscow), because
there is only one of you at this point, and critically -- and heres
the bit which makes it genuinely 1-p -- you are certain of all this.
Your subjective view, your 'what is it like to be', your
phenomenological state, your whateveryouwantocallit, is saturated
with the conviction that you are going to end up in both washington
and moscow.
From the 3p view, but the question is about the 1p unique experience
that you will live. You know with ceratinty, prior to the duplication,
that you will feel to be in only one city.
There will be no room for doubt until you open your eyes at the
terminal. At which point the game has changed radically. Now you
know that you have been annihilated and duplicated but do not know
which duplicate you are. Here you would predict 50/50 but not
before. Certainly not when the question is asked in step 3.
If I can predict today that tomorrow I will be in a state of
uncertainty, then I am already in a state of undertainty. Opening the
door is part of the experience: you push on a button and open the door.
You remark here is irrelevant, and should not change anything in the
reasoning. So, you *do* accept 50%. So you can proceed to step 4.
>> Note: I do believe we experience all possible outcomes, and you
can even say in truth there is only one "I", but this does not
remove the appearance of randomness as seen from the first person
views
Its my contention that there would be no appearance of randomness.
It appears, for simple mathematical reason, in all the diaries.
Our perceptions are coloured by our beliefs. If we are genuine
MWIers for example, we would not experience a feeling of randomness
at all. We would percieve things as wholly determined.
Not at all. MWIers explains that SWE *must* entail randomness, and
exactly the randomness we observed. It explains why we cannot see the
whole deterministic wave.
At least you criticize both the 1p randomness in comp and in MWI.
That's better than Clark.
>> I am curious, have you heard of the sleeping beauty problem? I
wonder what answer you would agree with:
I have. I studied Philosophy at UCL and watched Malcolm Budd and Ted
Honderich tear Arnold Zuboff to shreds on a regular basis at
departmental seminars. The thing is sleeping beauty is in a state of
maximal ignorance so I don't see how it relates.
>> Yes, but the question is if you were not told the protocol,
whether the machine would send you to one with 50% probability, or
send you to both locations, can you, (from the first person/
subjective point of view), distinguish these two cases?
Again, where there is ignorance there can be doubt. But it isn't the
doubt you want which is doubt in state of maximal knowledge.
>> Okay, that is fair.
I'm beginning to think Bruno defines 'self' in terms of self
reference within certain modal logics.
Not at all. With only s, 0, + and *. The trick is the Dx = "xx" method
that I have often described with some detail, but UDA does not need
it. The 3p and 1p diaries are quite enough for the UDA.
provability logic etc.
The provability logic are derived from s, 0, + and *.
Its a circular definition which I imagine will be problematic.
Which shows you lack some elementary computer science. The (3p) self
study is where computer science excels the most. There are many good
books.
but again my modal logic is very rusty so I won't argue the point ...
Modal logic plays no fundamental role at all. It just happens that
some modal logics capture soundly and completely machine's self-
referential proposition.
I think you understood enough to handle step 4. So please proceed.
Bruno
http://iridia.ulb.ac.be/~marchal/
--
You received this message because you are subscribed to the Google Groups
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/groups/opt_out.
