Title: Announcements
1Announcements
- For Tuesdays class read Heideggers Fundamental
Question of Metaphysics and Sartres Bad Faith - Papers are due next Thursday
- Exam Review Questions should be posted by this
weekend bring them to next Thursdays tutorial
2Searle, Minds, Brains and Programs The Chinese
Room
3Some Background
- (1) Machine Functionalism
- (2) Turing Test for Intelligence
4Machine Functionalism
- Predicated upon a functionalist theory of mind
- Whats that? Based upon the idea of functional
explanations. - What is a functional explanation?
- A functional explanation relies on the breaking
down of a system into its various component parts
and then seeks to explain the workings of the
system in terms of the capacities of the parts
and the way the parts are integrated with one
another.
5Functionalism
- A functional explanation is very similar, if not
identical, to what is called an operational
definitional in that instead of seeking the
essence of something, a what it is, we define
that something in terms of what it does,
operationally, the roles and purposes it
fulfills. That is what it primarily IS in a
functional explanation i.e., a VP in a
corporation it can be you, me, or anybody with
the requisite training thus, what makes a VP in
a corporation is not the .
6Functionalism
- particular physical instantiation, in this case
what particular person it happens to be, but
rather the tasks, purposes and experience in the
business setting. A VP is defined by his or her
role in the company not body size, ethnicity,
hair colour, etc. - Functionalism in the philosophy of mind
- The defining feature of a mental state is the
causal role it plays with respect to (1) inputs
(i.e., environmental effects on the body
7Functionalism in the philosophy of mind
- (2) other mental states and (3) outputs (i.e.,
behaviour) - Mental state defined by causal relations or as
is the case in machine functionalism a
programmable set of instructions, to sensory
stimulations (inputs), behavioural outputs and
other mental states.
8Functionalism in the philosophy of mind
- A Metaphysical thesis metaphysical
functionalism as a theory of mind. The
complexities of the functional analysis of how
mental states causally interact with each other
given inputs leading to behavioural outputs is
just WHAT MENTAL STATES ARE. In itself,
functionalism doesnt care what physical
realizations brains, silicon chips or whether
there are any such instantiations disembodied
spirits underlying such an analysis.
9Functionalism in the philosophy of mind
- Mental terms are characterized by their
functional role not physical composition think
of the VP example. - Machine Functionalism The Turing Machine
Example of functionalism - Turing machine specified by two functions
- (I) from inputs and states to outputs
- (II) from inputs and states to outputs
10Turing Machine Outline
- Turing machine finite number of states, inputs
and outputs and the two functions mentioned above
specify a set of conditionals, one conditional
for each combination of state and input. - Conditionals if the machine is in state S1 and
receives input I, it will then emit output O and
go into the next state S2. These conditionals
are often expressed in a machine table.
11Turing Machine Outline
- Simple version each system that has mental
states is described by a least one Turing machine
table of a certain sort. Also, each type of
mental state of a system is identical to one of
the machine table states specified in the machine
table - An illustration sufficient for our purposes on
board
12Turing Test for intelligence
- The test of which Schanks project is derivative.
- Let me explain.
- Now to Searle
- The target Strong AI
- Whats that?
- An appropriately programmed computer with the
right program successfully imitating our actions
and response really is a mind, it really has
intelligence it can understand and have mental
states.
13The Target
- The example Schanks work though the same
argument can be extended to AI in general. - Schank to program a computer to fill in the
gaps as we do in listening to stories. - This in-itself would be impressive like
understanding a joke, a whole lot of background
is implied and utilized. - Strong AI thus claims machines upon such
successful programming can understand such
stories and this explains the human ability to do
so
14Searle and the Chinese Room Argument
- The argument
- What can be concluded from this argument
- 1. I have inputs/outputs indistinguishable from
the most successful AI project and yet I do NOT
understand a single word of Chinese or any such
story. - 2. Therefore, formal manipulation does not
explain our grasp of language or stories. Though
as Searle concedes this example doesnt rise
to the level of proof that symbol manipulation is
not
15The Argument
- what is involved in our understanding, it does
make the hypothesis extremely implausible. - Well, I suppose that is an empirical
possibility, that such programs are part of
what we do in understanding but not the
slightest reason has so far been given to believe
that it is true, since what is suggested though
certainly not demonstrated by the example is
that the computer program is simply irrelevant to
my understanding of the story. (390)
16The Argument
- Whats missing meaning, representational
content, intentionality and consciousness. - The rest of the article consists of defending the
central argument against various objections and
then a diagnosis of how we ever came to believe
that AI was possible. - Objection understanding comes in degrees.
Couldnt a computer nevertheless partially
understand? For example, if we do logical
derivations and a computer does such derivations,
17The Argument
- then couldnt it be said that at least at that
level of intelligence, we are doing the same
thing? What is lacking? - Searle No, No, and what is lacking can be
referred to as original or intrinsic
intentionality.
18Key Quote
- We often attribute understanding and other
cognitive predicates by metaphor and analogy to
cars, adding machines, and other artifacts, but
nothing is proved by such attributions. We say,
The door knows when to open because of its
photoelectric cell. The adding machine knows
how (understands how, is able) to do addition and
subtraction but not division, and The
thermostat perceives changes in the temperature.
The reason w make these attributions is quite
interesting, and
19Key quote continued
- it has to do with the fact that in artifacts we
extend our own intentionality our tools are
extensions of our purposes, and so we find it
natural to make metaphorical attributions of
intentionality to them (390-1) - We have original intentionality a machine at
best has derivative intentionality i.e., a
machine could be calculating payroll or with
the same set of instructions calculating student
grades it doesnt care or know.
20The Debate
- Lets pause here How would you apply this
argument and quote to Dennetts intentional
stance? What is the debate? How do you think
Dennett would respond? - Can a machine think?
- Searle yes, we are such machines
- Can a digital computer think?
- Searle No. No amount of programming will lead
to understanding. Why not?
21Key quote
- Because the formal symbol manipulations by
themselves dont have any intentionality they
are quite meaningless they arent even symbol
manipulations, since the symbols dont symbolize
anything. In the linguistic jargon, they have
only a syntax but no semantics. Such
intentionality as computers appear to have is
solely in the minds of those who program them and
those who use them, those who send in the input
and those who interpret the output. (391)
22Key Quote
- Or to make the same point somewhat differently a
symbol is just that, a symbol. It begins to
symbolize something only after it has been
interpreted. For example, I am driving in my car
and see a sign symbolizing a school nearby. I
know what to do slow down because there may be
children playing. I have interpreted the sign in
such a manner in order for it to function as a
sign/symbol. The sign in-itself does not wear
its interpretation on its sleeve, nor is it an .
23Key Quote
- .interpretation. It has to be assigned an
interpretation- Let x represent.. Yet if
programs or functionalist theories of mind in
general, are composed of nothing more than the
manipulation of symbols or signs, then they do
not work in accounting for how we are able to
refer to things or to interpret they presuppose
an interpretation and thus they do not account
for such interpretation. And yet we, as
conscious beings, are fundamentally interpreting
beings.
24Metaphor
- A biological brain is needed.
- A popular metaphor of how to think of the
mind/body relation mind is to the brain as
program is to hardware - This metaphor breaks down at three points.
- 1. The hardware could be anything as long as
it satisfies computational specifications. It
could be stones, toilet paper, wind and water
pipes. This wont due it is not the right
stuff.
25Metaphor
- 2. Programs are purely formal mental states
are not - Indeed the belief as such hasnt even got a
formal shape in this syntactic sense, since one
and the same belief can be given an indefinite
number of different syntactic expressions in
different linguistic systems.(392) - 3. We need a brain.
26Diagnosis
- Computers provide simulations. We wouldnt
mistake a computer simulation of a forest fire
for the real thing, so why should we so mistake a
simulation of mental processes for the real
thing? - So why did we ever believe in AI?
- (1) Unlike the forest fire simulation example we
believe there is something called information
processing that we do and a computer does as
well interesting idea dont we simulate
forest fires as well in our thoughts about them?
27Diagnosis
- Searles response a return to his point
concerning original intentionality. - Thus if you type into the computer 2 plus 2
equals? it will type out 4. But it has no
idea that 4 means 4 or that it means anything
at all.(392) - (2) A residual behaviourism
- The Turing test is typical of the tradition in
being unashamedly behavioristic and
operationalistic, and I believe that if AI
workers totally repudiated
28Diagnosis
- Behaviorism and operationalism much of the
confusion between simulation and duplication
would be eliminated.(393) - (3). (2) combines with a residual dualism.
Recall the description of metaphysical
functionalism given above. The reason we
believe AI in terms of algorithms and computer
programming to be possible is because we are so
convinced that the mind is different from the
brain therefore, what is special about mental
processes could be captured
29Diagnosis
- via programs and silicon chips think of Data
on Star Trek. - Unless you believe that the mind is separable
from the brain both conceptually and empirically
dualism in a strong form you cannot hope to
reproduce the mental by writing and running
programs since programs must be independent of
brains or any other particular forms of
instantiation. (393)
30The Solution
- We need the brain.
- Whatever else intentionality is, it is a
biological phenomenon, and it is as likely to be
as causally dependent on the specific
biochemistry of its origins as lactation,
photosynthesis, or any other biological
phenomena.(393) - A Critique by way of illustration let us return
to one of our key quotes.
31Key quote
- Because the formal symbol manipulations by
themselves dont have any intentionality they
are quite meaningless they arent even symbol
manipulations, since the symbols dont symbolize
anything. In the linguistic jargon, they have
only a syntax but no semantics. Such
intentionality as computers appear to have is
solely in the minds of those who program them and
those who use them, those who send in the input
and those who interpret the output. (391)
Critique
32A Critique
- Searles main argument is that no matter how
sophisticated the program is, it is still just
symbol manipulation that doesnt rise to the
level of intentionality, meaning or
consciousness. To understand this we need brain
science. - But how is it any less mysterious and problematic
that intentionality, meaning or consciousness can
arise from neuron firings out of molecules and
cells as opposed to a manipulation of 0s and 1s
in a computer program? Isnt it just as
mysterious?
33A Critique
- Let us reread our primary quote on page 391, this
time substituting neuron firing for formal
manipulation system. Notice just how easily we
can do this. So then, what is the principled
difference? Can we not apply the same kind of
Chinese Room argument to a set of brain
processes causally described in terms of such
neuron firings? It too doesnt get us to
meaning, intentionality or consciousness. What
has the move to the brain accomplished?
34A Critique
- But you say we know its the brain nor a formal
program. But we want to know how? If the exact
same argument can be successfully applied to such
neuron firings then it is mere prejudice to
state that exactly the same conclusions shouldnt
apply. - But it takes the actual neuron firings
themselves, not just its description to do the
mental representative work? If Searle were to
take this line then (a) one could equally well
respond that it takes the actual algorithm itself
in its running to
35A Critique
- get AI and not merely a description i.e.,
describing how to bake a cake is not the same as
baking it, actually following the instructions.
Searle would reject this (b) still doesnt tell
us how we bridge the gap from a description of
such neuron firings and brain processes to
intentionality or consciousness. Can we not have
neurological processes occurring without meaning
or the same neurological process occur regardless
of what is being represented or said of the
world? What is ...
36A Critique
- so special about these neuron firings when other
such firings do not lead to consciousness? What
is so special about this greyish matter that it
gives rise to consciousness? More empirical
research wont help us we are asking what is it
about these bunches of cells that leads to
consciousness more detailed and complicated
description of such cells wont help us. - If the response is it just happens, brute
metaphysical fact.
37A Critique
- Well then, with formal symbol manipulation with a
program quite sophisticated and complicated
enough to truly imitate us it just happens.
Two can play at that game - There exists a conceptual gap for how symbol
manipulation leads to meaning. And Searle has
exploited that gap quite nicely with his thought
experiment. But, doesnt there exist a similar
conceptual gap for how neuron firings leads to
meaning or consciousness?
38A Critique
- If we are allowed to ignore the conceptual gap
with respect to brain processes by saying that it
just happens, then why are we not allowed to
ignore it in another respect a sophisticated
program? - Therefore, what exactly does the move to the
brain accomplish?
39Heidegger, On Dasein and Anxiety
40On Dasein and Anxiety
- This is actually the introduction to Heideggers
classic work Being and Time - I dont know why Pojman decided to call it On
Dasein and Anxiety given that in the
introduction, Heidegger doesnt talk about
anxiety - This presentation will take the form of two
parts (1) present what is here in the reading
(2) on Tuesday of next week, I will present some
of Heideggers existentialist themes FYI that
do talk about anxiety in order to complete the
presentation
41The Fundamental Question
- In the question which we are to work out, what
is asked about is Being that which determines
entities as entities, that on the basis of which
entities are already understood, however, we may
discuss them in detail. The Being of entities
is not itself an entity.(467-8) - Every inquiry is a seekingInquiry, as a kind of
seeking, must be guided beforehand by what is
sought. So the meaning of Being must already be
available to us in some way. As we have..
42The Fundamental Question
- intimated, we always conduct our activities in
an understanding of Being. Out of this
understanding arise both the explicit question of
the meaning of Being and the tendency that leads
us towards its conception.(467) - Two points here (I) a pre-ontological
understanding of Being we all have it - (II) How Heideggers project differs from
traditional metaphysics the forgotten question
of Being.
43A Clue to understanding Being
- Being is always the Being of an entity. The
totality of entities can, in accordance with its
various domains become a field for laying bare
and delimiting certain definite areas of subject
matter. These areas, on their part (for
instance, history, Nature, space, life, Dasein,
language, and the like) can serve as objects
which corresponding scientific investigations may
take as their respective themesThe basic
structures of any such area have already been
worked out after a
44A Clue to understanding Being
- fashion in our pre-scientific ways of
experiencing and interpreting that domain of
Being in which the area of subject matter is
itself confined. (469) - Being as that which is understood in the forming
of the basic concepts that demarcates a field of
study such basic concepts arises from our
understanding of Being itself.
45A Clue to understanding Being
- A psychologist, sociologist, biologist etc., has
an understanding of what it is that they are
studying and the methods appropriate for that
field of study. This understanding which
underlies the various methodologies and forms the
criterion for that field of study, Heidegger
claims arises from an understanding of being that
has already been presupposed. We need to make
that understanding explicit.
46The ontic/ontological
- Ontological inquiry is indeed more primordial,
as over against the ontical inquiry of the
positive sciences.(470) - What is the ontic/ontological distinction?
- A good way of describing this distinction is
through a chess playing example. - Ontic the pieces themselves rook, knight,
king, queen. They are the beings. - Ontological the chess playing itself. Such
playing, its rules and strategies, is itself ..
47The ontic/ontological
- .not a chess piece. It is what gives the
meaning and significance for all the pieces
themselves. Thus Being is not a being. The ontic
is not the ontological however, it is the
ontological that gives meaning and access to
whatever it is that we understand by the ontic.
48Where and How do we begin?
- Answer with us?
- Dasein is an entity which does not just occur
among other entities. Rather it is ontically
distinguished by the fact that, in its very
Being, that Being is an issue for
itUnderstanding of Being is itself a definite
characteristic of Daseins Being. - We are the ones that asks the question we have
a priority and privilege in that regard
49So how does it stand with our Being
- Dasein always understands itself in terms of its
existence in terms of a possibility of itself
to be itself or not itself. Dasein has either
chosen these possibilities itself, or got itself
into them or grown up in them already. Only the
particular Dasein decides its existence, whether
it does so by taking hold or by neglecting.(471) - Main point the model of self-knowledge that
arises here.
50Our Basic Defining Characteristic
- What is that? Our being-in-the-world
- But to Dasein, Being in a world is something
that belongs essentially. Thus Daseins
understanding of Being pertains with equal
primordiality both to an understanding of
something like a world, and to an understanding
of the Being of those entities which become
accessible within the world (471) - Why is this important? (1) The metaphysics
behind it. As Gadamer would say, the relation
takes precedence over the relata
51Our Basic Defining Characteristic
- We are being-in-the-world therefore,
Descartes, Hume, Russells etc. starting point of
a self-contained subject that needs to break
out into the world is already a mistaken
philosophical beginning and misunderstanding of
who we are. Without others and a world there
would be no subject - Some illustrations here (i) historical work
(ii) the reading of texts (iii) game playing - What these illustrations are supposed to.
52Our basic defining characteristic
- .accomplish is that we can make sense of the
idea of a middle ground between subject and
object. How the relation takes precedence over
the relata. - 2) As a response to the skeptic the
relationship between metaphysics and
epistemology. - No ontological gap that needs to be traversed.
If anything as being-in-the-world we are already
that so-called ontological gap
53The Ontological Analytic
- The kind of Being which belongs to Dasein is
rather such that, in understanding its own Being,
it has a tendency to do so in terms of that
entity towards which it comports itself
proximally and in a way which is essentially
constant in terms of the world. In Dasein
itself, and therefore in its own understanding of
Being, the way the world is understood is, as we
shall show, reflected back ontologically upon the
way in which Dasein itself gets interpreted.
(473)
54The Ontological Analytic
- This relates to the question of self-knowledge we
posed earlier. What are the entities closest to
us that we have dealings with? - Objects.
- Thus, it is in terms of these entities that we
have the habit of interpreting ourselves
reflected back ontologically upon the way in
which Dasein itself gets interpreted. - This is not to be our approach
55The Ontological Analytic
- We have fundamentally a different mode of being
than objects. It was a mistake, though naturally
done, to interpret ourselves with the same
categories and understanding as we do objects.
How we relate to our own mortality and finitude
which fundamentally defines the self we are
involves different considerations than that
employed in the study of objects. It is mere
prejudice to sweep this under the rug or
describe such considerations as merely
psychological with ontological truth being the
studies of objects.
56The Ontological Analytic
- To put it negatively, we have no right to resort
to dogmatic constructions and to apply just any
idea of Being and actuality to this entity, no
matter how self-evident that idea may be nor
may any of the categories which such an idea
prescribes be forced upon Dasein without proper
ontological consideration (473)
Question can you see how Ryle
got his idea of a category mistake from his
reading of Heidegger though Heidegger is not a
behaviourist ?
57The Ontological Analytic
- We must begin from the ground up. But how do we
start? - Heidegger states that we must start with our
average everydayness. - Not a la Descartes, with an epistemological
agenda and criteria. We begin by analyzing how
matters stand in everyday mundane activities.
58Time the Key
- We shall point to temporality as the meaning of
the Being of that entity which we call Dasein.
If this is to be demonstrated, those structures
of Dasein which we shall provisionally exhibit
must be Interpreted over again as modes of
temporality. (473) - The Thesis every ontological/philosophical
understanding that we possess comes with it a
certain understanding of time which enables such
an understanding.
59Time the Key
- Time is the condition for the possibility of
philosophical understanding, it is central. - For example,
- An object understood in terms of constant
presence. Time conceived of as a linear series
of now points. The past as gone is thus not
real while the future as not yet is similarly
not real. What is real here is the now. - The human being a different relation to time.
60The task of Destroying the History of Ontology
- The importance of History?
- Three Key points here.
- (1) We are historical beings, radically,
essentially, historical. The self is an entering
into a historical transmission of ideas that
needs to be considered and thematized in its own
right. It needs to be critiqued and
philosophically appropriated? We need to
examine our cultural heritage of meanings that
have in many ways formed us and ask ..
61The Task of Destroying the History of Ontology
- .after its foundations. What is its basis?
Do they attempt to hide a fundamental truth
namely, cultural heritages may have no basis at
all? What if such a proliferation of values and
meanings that our cultural heritage gives us to
justify and assure certain ways of living and
also certain ways of surveillance and judgment of
others is at root a fleeing in the face of the
anxiety that it has no ultimate ontological
foundation at all that the essence of grounds
arises from the abyss?
62The task of Destroying the History of Ontology
- How is this radical? Think of the philosophers
you have studied. When Descartes secured his I
think, therefore I am and built his house of
knowledge upon such a basis, is what historically
preceded him important? - Did Hume need to think historically to piece
together impressions? - Main thesis here previous philosophy attempts
to think ahistorically in securing truth. A
mistake.
63Importance of History
- (2) We study history not because we have some
peculiar interest in the past but rather because
of the possibilities buried in the past for our
future. - The future takes precedence the past comes to
us from out of the future. It is in how we view
our future that facts from the historical past
becomes salient for us and are noticed.
64The Importance of History
- (3) The philosophical questions we ask, what
makes sense to us, are posed due to the
historical tradition we inhabit and have
inherited - When tradition becomes master, it does so in
such a way that what it transmits is made so
inaccessible, proximally and for the most part,
that it rather becomes concealed. Tradition
takes what has come down to us and delivers it
over to self-evidence it blocks our access to
those primordial sources from which the
categories
65The Importance of History
- and concepts handed down to us have been in
part quite genuinely drawn.(476) - Notice here the negative critique of tradition
the primary experiences becomes ossified into a
tradition that has forgotten itself. They are
simply received as self-evident truths and what
has grounded them in terms of fundamental
experience and insight, such self-evidence
becomes lost. - The same is true of our question concerning being.
66The Importance of History
- Now, if we wish to pose our philosophical
question concerning the meaning of Being we have
to go back to where it all started
philosophically for us ultimately to the
ancient Greeks the beginnings of the Western
philosophical and scientific tradition. Here is
where we start our critique to regain what those
fundamental experiences were that started us on
the path to philosophizing.
67The Importance of History
- We understand this task as one in which by
taking the question of Being as our clue, we are
to destroy the traditional content of ancient
ontology until we arrive at those primordial
experiences in which we achieved our first ways
of determining the nature of Being the ways
which have guided us ever since.In thus
demonstrating the origin of our basic ontological
concepts by an investigation in which their
birth certificate is displayed.. (476)
68The Importance of History
- We are to critique this tradition back to its
primary experiences and consider whether such
experiences of philosophical questioning has been
corrupted i.e., in some of Heideggers writings
it was those first fateful steps taken in Greek
philosophy that led to our technological world
and in general ultimately to Nihilism from
Plato to Nietzsche encapsulates our Western
Philosophical Tradition.
69The Method Phenomenology
- Whats that?
- Phenomenology means to let that which shows
itself be seen from itself in the very way in
which it shows itself from itself.(477) - The great battle cry of phenomenology in the
early 20th century was a return to the things
themselves. It was believed that philosophical
thinking got lost in its abstractions and
concept- ualizations, puzzles, so much so that it
lost sight of our concrete lived experience of
the world.
70The Method Phenomenology
- It was time to recapture our concrete lived
experience of phenomenon and let that be the
guide to our philosophy and not false theoretical
dichotomies. Our ontology should reflect
concrete, lived, experience and not the
abstractions and idealities that objectivistic
thinking promotes. For many continental
philosophers of that time this theme translates
into a critique of the sciences they attempt,
according to their methodology and idealizations
to.
71The Method Phenomenology
- to present the world as an omniscient god would
perceive it rather than how we experience it.
This attempt as Merleau-Ponty called it in the
late 40s, the view from nowhere was
considered to be itself a false philosophical
ideal and abstraction. Thus, the preliminary
conception of phenomenology was to let that which
shows itself be seen from itself.
72The Method Phenomenology
- To make explicit what is hidden
- What is it that by its very essence is
necessarily the theme whenever we exhibit
something explicitly? Manifestly, it is
something that proximally and for the most part
does not show itself but at the same time it is
something that belongs to what thus shows itself,
and it belongs to it so essentially as to
constitute its meaning and its ground. (478)
73The Method Phenomenology
- This corresponds to our basic theme being is
what is closest to us, right under our noses, but
for that reason it is what is farthest. We need
to unearth what we mean here. - An interesting manner in which phenomenon gets
covered up the assertion.
74The Method Phenomenology
- Whenever a phenomenological concept is drawn
from primordial sources, there is a possibility
that it may degenerate if communicated in the
form of an assertion. It gets understood in an
empty way and is thus passed on, losing its
indigenous character, and becoming a free
floating thesis. (478) - We can make some interesting linkages between
this characteristic of the assertion and what has
been said regarding tradition earlier.
75The Method Phenomenology
- But here two senses
- (1) What we would call the talking head
syndrome. Our primary experience gets embodied
in an assertion. However, assertions have the
characteristic that as communication flows it can
get severed from such primary experiences and
become an object in its own right.
76The Method Phenomenology
- Have you ever had the experience in talking to
someone, say of a somewhat technical matter,
where they are using all the concepts and
theoretical terms correctly, in that they know
what follows from what in the use of such
concepts, but you cant help thinking that they
do not have a clue what they are talking about?
Happens all the time in philosophy. - (2) The assertion is hypostatized as a thing
itself either as a proposition and/or belief
state.
77The method Phenomenology
- Phenomenology is this task of making explicit
according to the things themselves - And this leads to the fundamental theme of
philosophical investigation - Being is the transcendens pure and simple (479)
- Why is this important?
- A de-centering of the subject. The
transcendental origins of all of our
understandings are not categories of the
understanding or a philosophy of mind but
rather an understanding of Being.
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