  The holographic principle asserts that the observable number of degrees of
freedom inside a volume is proportional not to the volume, but to the surface
area bounding the volume. There is currently a need to explain the principle in
terms of a more fundamental microscopic theory. This paper suggests a potential
explanation. This paper suggests that in general, for an observer to observe
the r coordinate of an event, the process of making that observation must
generate at least as much entropy as the information that the observation
gains. Following on from that, this paper sets out a simple argument that leads
to the result that observers on the surface of a sphere can observe an amount
of information about the enclosed system that is no more than an amount that is
proportional to the surface area of the sphere.
