Dangerous Knowledge Page #6
- Year:
- 2007
- 89 min
- 115 Views
I don't want to have to leave.
I want time, for me, to stop.
The great and controversial thing
that Boltzmann had done,
was to introduce,
into the unchanging perfection
of classical physics,
the notion of real time.
Of irreversible change.
And yet it was this man,
who in his final moments,
wanted time to stop.
So ironically, Boltzmann was
vindicated just after his death.
If he would have
waited a little longer,
Boltzmann would have been
one of the fathers of the
revolution of the
twentieth century fysics.
Yet Boltzmann died as he had lived:
out of step with his times.
He had sawn the seeds of
uncertainty and fysics,
but no school of followers
took up his work.
Against all the odds,
it was Cantor,
who had uncovered the
uncertainty in mathematics,
around whom followers
where gathering.
A new generation of mathematicians
and philosphers were convinced:
problems and paradoxes
that had defeated Cantor,
maths could be made perfect again.
The most prominent amongst them,
Hilbert, declared:
the definitive clarification of the
nature of the infinite,
has become necessary for the honour
of human understanding itself.
They were so concerned to
find some kind of certainty,
they had come to believe
that the only kind of understanding
that was really worth anything,
was the logical and the provable.
And a measure of how desperate this
attempt to find the perfect system
of reasoning and logic
had become, is this:
three volumes of the Principia
Mathematica, published in 1910.
It takes a huge chunk
of this volume,
just to prove, that one
plus one equals two.
And a large part of that proof,
revolves around the problems
of the finite and the infinite,
and the paradoxes that
Cantor's work had trown up.
But despite the Principia,
there was now the feeling
that the logic of maths,
had undone itself,
and it was Cantor's fault.
As the Austrian writer, Musil
wrote at the time:
suddenly mathematicians, those
working in the innermost region,
discovered that something
in the foundations,
could absolutely not
be put in order.
Indeed, they took
a look at the bottom,
and found that the whole edifice,
was standing on air.
Cantor had stretched the limits of
maths and logic to breaking point,
and paid for it.
Much of the last
twenty years of his life,
was spent in and out
of the asylum.
The last time that Cantor came
here to the Nervenklinik in Halle,
was in 1917, and he truly
did not want to be here.
He wrote to his wife,
begging her to let him come home.
He was one of only
two civilians left here.
The rest of the place, was filled
with the casualties of World War I.
But of the 6th of January 1918,
the greatest mathematician
of his century,
died alone in his room,
his great project still unfinished.
Cantor had dislodged the pebble,
which would one day
start a landslide.
For him, it had all
been held together.
The paradoxes resolved, in God.
But what holds our ideas together,
when God is dead?
Without God,
the pebble is dislodged,
and the avalanche is unleashed,
and World War I, had killed God.
Here at last,
was the slippage.
Well, hasn't there always been a
desire in the history of the West
to find certainty or...maybe,
there wasn't so much a desire
in earlier era's because, the
assumption was that we had that.
You know, there was God!
And, you know even Descartes,
despite all of his scepticism,
assumes...
for him unproblematically,
that there is a God.
So what happens when that really,
really comes in to question?
After the death of God,
so to speak.
And along with the death of God
is a...is a loss of faith in some...
supernatural order,
No one won the Great War.
Nothing was resolved at Versaille.
It was merely an armistice.
And none of the intellectual
crises that proceded it,
had been resolved either.
Things like the Principia, had
merely papered over the cracks.
In a way, the Principia was
like the Versaille Treaty,
only a lot more substantial.
This is basicly ten thousend
tonnes of intellectual concrete
poured over the
cracks in mathematics.
And for a while, it looked
like it really might hold.
But then a young man came here
to the university of Vienna,
to this library.
His name was Kurt Gdel.
And the work that he did here,
brought that dream of finding
the perfect system of reasoning
and logic, crashing down.
Gdel was born the year
Boltzmann died:
1906.He was an insatiably
questioning boy,
growing up in unstable times.
His family,
called him:
"Mister Why".But by the time he
went to university,
World War I was over.
But Austria like the rest of Europe,
was in the grip of the depression,
and Hitler was forming
Gdel for his part,
became one of a brilliant group
of young philosophers,
political thinkers,
poets and scientists,
known as 'The Vienna Circle'.
Chaos was good because it ment
that there was no central authority
that was imposing ideas
so individuals could come
up with their own ideas.
The chaos around them,
on the one hand
had a liberating effect.
And on the other hand they were
desperately searching for ideas,
that they could believe in because
everything else around them
was crumbling in a heap.
So you'd want to
find some beautiful ideas
that you could believe in.
Though Gdel was surrounded by
radicals and revolutionary thinkers,
he was not one himself.
He was an unworldly and exact man,
who believed, like Hilbert,
that maths at least,
could be made whole again.
But it was not to be.
He certainly did not start out,
with trying to explode
Hilbert's program also.
In fact,
i think it came to Gdel...
ultimately as a surprise when
he showed that the next step,
to show the completeness of
arythmetic, was unachievable.
There was actually something
very mysterious happening
in pure mathematics.
In it's own way as mysterious as
black holes, the big bang,
as quantum uncertainty in the atom.
And this was Gdel's
Incompleteness Theorem.
And at that time,
there was a mystery there.
expect there to be mystery
is in pure reason!
Because pure reason should be black
and white. It should be really clear.
But, pure reason,
thing that were unclear.
This is one of the cafs
where the Vienna Circle
used to meet regularly.
Late summer of 1930,
Gdel came to the caf
with two eminent colleagues.
Towards the end
of their conversation,
he just mentioned an idea
he'd been working on,
which he called
the 'Incompleteness Theory'.
And what he told them,
was that he had just proved,
that all systems of
mathematical logic, were limited.
would never be able to
be proved to be true.
What Gdel showed in
his Incompleteness Theorem,
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