erefore, have spatial
co-ordinates against which to form a 'memory' pattern of former and
future action.

"Now as I understand gravity, it's simply the statement that all
particles in space are covetous, in this same non-sentient sense, of
the position in space of all their neighboring particles. In other
words, it's a contravention or the attempted contravention of the
statement that two particles may not be in the same place at the same
time. It seems that all particles have an urge to try to be in each
other's space. And this desire is modified by the distance that
separates them.

"This adds up to three rules:

"1. No two particles may occupy the same space at the same time.

"2. Even though they can't, they try.

"3. They all know where they're going, and where they've been without
relation to anything but the spatial co-ordinates around them.

"That third statement seems to me to knock something of a hole in
Einstein's relativity theory. Unless you wish to grant all these
particles some method of determining their relationship to particles
that are not near them.

"Communication between particles by any means is apparently limited by
the speed of light, which is a relationship between space and time,
but apparently, from what we know of inertia, if the universe
contained only a single particle, and that particle was in motion, it
would continue to move regardless of the fact that its motion could
not be checked upon in relation to other particles.

"This indicates to me that the particle has an existence in space
because it is created out of space, and that space must, therefore,
have some very real properties of its own regardless of what is or is
not in it. The very fact that there is a limiting speed to light and
particle motion introduces the concept that space has physical
properties.

"In order to have an electromagnetic wave, one must have a medium in
which an electric field or a magnetic field may exist. In order to
have matter, which I believe to be a form of electromagnetic field in
stasis, one must have special properties which make the existence of
matter possible. In order to have inertia, one must also have spatial
properties which make the existence of inertia possible.

"People are fond of pointing out that there's nothing to get hold of
in free space in order to climb the ladder of gravity, or in order to
move between the planets, and that the only possibility of motion of a
vehicle