358
DOC.
18
DISCUSSION OF DOC.
17
Prof.
Einstein:
The
main
thing
now
is
to set
up
the
most exact
experiments
possible
in
order
to test
the foundation. In the
meantime,
all this
brooding is
not
going
to
take
us
far.
Only
those
consequences can
be of interest that lead
to
results that
are,
in
principle,
accessible to
observation.
Prof.
Meissner:
You
have
brooded
over
this,
and discovered
the
magnificent
time
concept.
You found that
it
is not
independent.
This
must
be
investigated
for other
concepts
as
well.
You
have shown
that
mass
depends
on
the
energy
content,
and
you
have
made the
concept
of
mass more
precise.
You
did not
carry
out
any
physical
investigations
in
the
laboratory-you
were
brooding
instead.
Prof.
Einstein:
The observations
we
made created
an
embarrassing predicament
for
us.
Prof.
Meissner:
Just think of non-Euclidean
geometry.
People
thought they
knew
what
an angle was,
but
they
did not.
Dr. Lämmel:
Regarding
these
speculations,
the
question is
whether
we
are
dealing
with
mathematical
or physical
considerations.
Purely
mathematical considerations
cannot
produce
anything
but
premises,
while
physical
considerations
can open new
paths.
Hence
I
understand the
statements
made earlier
by
Prof.
Einstein.
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