Dangerous Knowledge Page #9
- Year:
- 2007
- 89 min
- 115 Views
despite all these theorems we
know about non-computability,
it still might be, that we
are computational entities,
and then point out:
well, because of this and
this loophole and so on.
And maybe he...
came to believe those loopholes
were sufficient to get him out.
But yet, he did do these things
like looking at oracle machines
which were sort of super
Turing machines; went beyond them.
They're not machines that you
could see any way of constructing
out of ordinary stuff.
But nevertheless,
as a theoretical entity,
these devices were...
theoretical things which would
go beyond, standard computers.
This tension, between the
human and the computational,
was central to Turing's life.
And he lived with it,
until the events
which led to his death.
After the war, Turing
increasingly found himself
drawing the attention
of the security services.
In the Cold War,
homosexuality was seen,
as not only illegal and immoral,
but also a security risk.
So when in March 1952,
he was arrested,
charged and found guilty
of engaging in a homosexual act,
the authorities decided, he was
a problem that needed to be fixed.
They would chemically castrate him
by injecting him with the
female hormone estrogen.
Turing was being treated
as no more than a machine,
chemically reprogrammed,
to eliminate the uncertainty
of his sexuality,
and the risk they felt it posed,
to security and order.
To his horror,
he found the treatment
affected his mind and his body.
He grew breasts,
his moods altered, and he
worried about his mind.
For a man who had always been
authentic, and at one with himself,
it was as if he had been
injected, with hypocrisy.
On the 7th of June 1954,
Turing was found dead.
At his bedside, an apple...
from which he had
taken several bites.
Turing had poisoned
the apple, with cyanide.
Turing was dead,
but his question was not.
Whether the mind was a computer,
and so limited by logic,
or somehow able
to transcend logic,
was now the question that came
to trouble the mind of Kurt Gdel.
Gdel was now working in America,
at the institute for advanced study,
where he continued to work,
as obsessively as he ever had.
Of course, Gdel recovered
from his time in the sanatorium,
but by the time he got here
to the Institute for Advanced
Study in America,
he was a very peculiar man.
One of the stories
they tell about him,
is if he was caught in the Commons,
he so hated physical contact,
that he would stand very still
so as to plot the
perfect course out,
so as not to have to
actually touch anyone.
He also felt he was being poisoned
by what he called "bad air",
from heating systems
and air conditioners.
And most of all, he thought
his food was being poisoned.
He insisted his wife,
taste all his food for him.
He would sometimes,
order oranges,
and then send them straight back
claiming they were poisoned.
Peculiar as Gdel was,
his genius was undimmed.
Unlike Turing,
Gdel could not believe
we were like computers.
He wanted to show
how the mind had a way
of reaching truth outside logic,
and what it would
mean, if it couldn't.
In principal you can
deducing all the consequences
of a fixed set of principles
and mathematics would
be static and dead.
I mean, it would just be
a question of mecanically...
deducing all the consequences.
And so...
and so mathematicians in a
sense would just be...machines.
I mean, Turing did think
that he was a machine.
I think he did.
And i think...
that paper on
the imitation game...
shows that.
And Gdel, clearly did not
think that he was a machine.
He thought that he was divine.
You know, that human beings
have a...devine spark in them
that enables them to create
new mathematics i think.
Why was Gdel, so convinced
humans had this spark of creativity?
The key to his believe,
comes from a deep conviction
he shared with one of the
few close friends, he ever had.
That other, Austrian genius,
who had settled at the institute:
Albert Einstein.
Einstein used to say
that he came here,
to the Institute for Advanced Study,
simply for the privilege of
walking home with Kurt Gdel.
But what was it that held this
most unlikely of couples together?
Because on the one hand,
you've got the warm
and avuncular Einstein
and on the other,
the rather cold, wizened,
and withdrawn Kurt Gdel.
And the answer i think,
comes from something
else that Einstein said.
He said that,
God may be subtle
but he's not malicious.
What does that mean?
What it means for Einstein,
is that however complicated
there will always be beautiful
rules, by which it works.
Gdel believed the same idea
from his point of view to mean,
that, God would never
have put us into a creation,
that we could then not understand.
The question is,
how is it that Kurt Gdel can
believe that God isn't malicous?
That it's all understandable?
Because Gdel is
the man who has proved,
that some things can not be
proven logically and rationally.
So surely, God must be malicious.
The way he gets out of it,
is that Gdel, like Einstein,
believes deeply in intuition.
That we can know things,
outside of logic,
because we just...intuit them.
And they believe it
because they have both felt it.
They've both had
their moments of intuition.
Just like Cantor had had his.
He talks about new principals...
that the mathematician...
closing your eyes,
tuning out the real world,
you can try to perceive,
directly by your
mathematical intuition,
and come up with new principles,
which you can then
use to extend the...
the current set of
principles in mathematics.
And he viewed this as a way
of getting around, i think,
the limitations of his own theorem.
I don't think he thought
there was any limit
to the mathematics that
But, how do you prove this?
The interpretation that
Gdel himself drew,
was that...
computers are limited.
again, to work out that...
the human mind
transcends the computer.
In the sense that he can
understand things to be true,
that can not be proven,
by a computer program.
Gdel also was
wrestling with some...
finding means of knowledge,
which are not based on experience
and on mathematical reasoning,
but on some sort of intuition.
The frustration for Gdel,
was getting anyone to understand him.
I think people very often, for
some reason, misunderstand Gdel.
Certainly his intention.
Gdel was deliberatly
trying to show,
that, what one might call
"mathematical intuition".
He referred to, what he called,
"mathematical intuiton",
and he was...
demonstrating, clearly in
my mind demonstrated,
that this is outside
just following formal rules.
And, i don't know...
Some people...
picked up on what he did and said,
well, he's showing there are
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