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From YouTube: Feynman: Take the world from another point of view (1/4)
Description
Richard Feynman
Take the world from another point of view
Part 1/4
A
Take
any
crazy
idea:
oh
I,
don't
know
it's
hard
to
make
up
a
very
crazy
one
day
witches
or
something
like
that.
You
tell
about
what
people
used
to
believe
in
witches
and,
of
course
nobody
believes
in
witches
now,
and
you
say
how
could
they
believe
in
witches?
Then
you
turn
around.
You
say,
let's
see,
which
is,
do
we
believe
in
them?
What
ceremonies
do
we
do?
Every
morning
we
brush
our
teeth.
What
is
the
evidence
that
the
brushing
of
teeth?
Does
us
any
good
in
canvas?
A
You
start
wondering:
are
we
all
imagined
if
it
look
as
the
Earth
turns
on
the
orbit,
there's
an
edge
between
light
and
dark
and,
along
that
edge,
all
the
people
along
that
edge?
Look
we're
doing
the
same
Mutual
for
no
good
reason,
just
like
in
the
Middle
Ages
they
had
other
rituals
and
you're
try
to
picture
this
perpetual
line
of
good
toothbrushes
going
around
the
earth
it's
to
take
the
world
from
another
point
of
view.
A
Now
it
may
be
may
well
be
that
brushing
teeth
is
a
very
good
thing
because
it
gets
rid
of
cavities
and
you're
gonna.
Ask
you
can
find
out
whether
it
does
or
it
doesn't
by
trying
to
find
out
now.
You
can
ask
your
dentist.
He
says,
of
course,
and
you
say
how
it
evidence:
I
have
not
found
that
evidence
from
dentists,
because
they
just
learned
it
in
school
now
I'm,
not
trying
to
argue
that
it's
good
or
bad,
the
brush
tease.
A
You
see
I
had
in
my
life
a
number
of
pleasant
experiences
that
when
the
earliest
one,
when
I
was
a
kid
I
invented
a
problem
for
myself,
the
some
of
the
powers
of
the
integers
and
in
trying
to
get
the
phone
apart,
I
developed
a
certain
set
of
numbers
that
I
Colombian,
for
which
I
couldn't
get
and
I
discovered
later
that
those
were
known
as
the
Bernoulli
numbers
in
discovered
in
1739.
So
I
was
up
to
17
39
when
I
was
about
14
and
a
little
later,
I
discover
something
I
find
out.
A
I
just
may
invented
the
thing
called,
which
we
now
call
a
operator
calculus
and
that
was
invented
in
1890,
something
you
see,
I
was
gradually
I
was
inventing
things
that
came
later
and
later,
but
the
moment
when
I
began
to
realize
that
I
was
now
working
on
something
new
was
where
I
read
about
quantum
electrodynamics
at
the
time
and
I
read
a
book
and
I
learned
about
it.
For
example,
I
read
The
Rock's
book
and
he
had
these
problems
that
nobody
knew
how
to
solve.
It
was
described
there.
B
Richard
fineman
Nobel
prize-winner
and
his
son
Carl
stepped
gingerly
down
the
wet
couples
of
Milbank
high
in
the
yorkshire
penknives
Fineman,
professor
of
physics,
at
the
California
Institute
of
Technology
retreats
to
this
remote
village
near
his
wife's
home
for
a
special
purpose.
It's
here
he
finds
the
time
and
solitude
to
sift
the
ideas
that
have
made
him
the
most
feared
and
original
mind
in
modern
physics.
B
A
Once
submission
all
the
kids
were
all
walking
in
little
parties
with
their
fathers
in
the
woods,
then
the
next
Monday
we
were
playing
in
a
field
and
kids
said
to
me
say:
what's
that
bird?
What's
the
name
of
the
you
know,
the
name
at
Perez
is
I'm
the
slightest
idea.
He
said:
well,
it's
a
brand
throated
thrush.
He
says
your
father
doesn't
teach
you
anything,
but
my
father
had
already
taught
me
about
the
names
of
birds
he
once
we
walked
in.
He
says:
that's
a
brand
through
the
thrush.
A
He
says
know
what
the
name
of
that
burns
around
toilets
rice
in
German,
it's
called
a
freaking
eagle
in
Chinese,
is
called
a
king
Wang
pong
in
Japanese
are
posh,
Sahara
and
so
on
and
did
when
you
know
all
the
names
in
every
language
of
that
bird.
You
know
nothing
but
absolutely
nothing
about
the
bird.
Then
we
would
go
on
and
talk
about
the
pecking
in
the
feathers,
so
I
had
learned
already.
That
names,
though,
constitute
knowledge.
It's
in
knowing
the
name
of
something.
A
That's
caused
me
a
certain
trouble
since,
because
I
refused
to
learn
the
name
of
anything.
So
when
someone
comes
in
and
says
you
know
the
explanation
for
the
fits
corner,
an
experiment
Isis,
what
what?
What's
that
he
says,
you
know
that
the
long
lived
came,
a
son
disintegrates
into
two
pies.
Oh,
oh,
yes,
now
I
know
but
I
never
know
the
names
of
things.
What
he
forgot
to
tell
me
was
that
the
knowing
the
names
of
things
is
useful.
If
you
want
to
talk
to
somebody
else,
so
you
tell
him
what
you're
talking.
B
A
B
A
So
if
you
would
ask
later,
I
did
some
little
amusing
research
for
a
paper
in
college
on
sleep,
but
it
started
with
a
question
of
his
kind
suppose
you
were
a
Martian
who
never
slept.
They
didn't
have
sleep,
you
didn't
have
to
sleep,
and
you
came
down
to
this
earth
and
you
saw
these
people
had
this
funny
crappy
that
every
day
we're
certain
about
that
I
had
to
lie
down
and
become
unconscious,
and
then
the
natural
question
would
be.
How
does
it
feel
to
get
unconscious
I?
What
happens
to
you?
A
A
There
are
lots
of
things
that
people
did,
for
example,
Maxwell
put
the
equations
together
with
the
Faraday.
He
formulated
the
equations
mathematically
with
some
model
in
his
head
and
and
Dirac
got
his
answer
by
just
writing
and
guessing
an
equation,
and
other
people
got
their
ass,
like
in
relativity
got
the
idea
by
looking
at
principles
of
symmetry.
A
Now
all
these
methods,
a
Heisenberg
got,
is
quantum
mechanics
by
thinking
only
talked
about
the
things
that
you
can
measure.
Now
all
these
ideas.
We
should
only
talk
about
things
that
we
can
measure,
try
to
define
things
in
terms
of
only
things
you
made
or
let's
formulate
the
equation.
Mathematically
or,
let's
guess
the
equation,
or
all
these
things
are
tried
all
the
time
look
for
symmetries
all
that
stuff
is
tried
all
that
stuff.
When
we're
going
against
the
pub.
A
We
do
all
that
that's
very
useful,
but
we
all
know
that
that's
what
we
learned
in
the
physics
class
is
how
to
do
that
with
the
new
problem,
where
we're
stuck
we're
stuck
because
all
those
methods
don't
work.
If
any
of
those
methods
would
have
worked,
we
would
have
gone
proved
there.
So,
where
we
get
stuck
in
a
certain
place,
it's
a
place
where
history
will
not
repeat
herself
and
that's
what
makes
it
even
more
exciting.
A
A
Therefore,
a
thing
like
the
history
of
the
idea
is
an
accident
of
how
things
actually
happen
and
if
I
want
to
turn
the
history
around
to
try
to
get
a
new
way
of
looking
at
it,
it
doesn't
make
any
difference.
It
I,
don't
care
the
only
thing
that
the
real
test
in
physics
is
experiment
that
history
is
fundamentally
irrelevant.