All the considerations we have made up to now
comprise as their
base such simple
collisions of particles, atoms or molecules.
If we used a great magnification or amplification
we would find that
our question whether
the Natural Law strictly defines the fate
of the universe
is reduced to the simple question
whether the output
of an elementary collision
can be predetermined with absolute accuracy.
That is all.
As simple as that.
What happens during the collision of two
particles also happens in the whole Cosmos.
In the second half of the 19th century
the kinetic theory
of gases was developed
which is today generally accepted
because its results agree with our
These considerations were based on the assumption
that the molecules
are something like little
"hard balls" and that when they collide, they follow
just the same laws of mechanics as the billiard balls
when they hit each other or the sides of the table.
The question whether the trajectory
of each particle after the collision could
be strictly defined was not raised.
Anyway It was of no interest.
The theory describes
the behaviour of the gas.
The fate of each molecule was completely irrelevant.
(as such assumptions are usually made tacitly )
one could assume that there was no reason to put into
question the absolute validity of the laws of mechanics.