  Quantum electrodynamics presents intrinsic limitations in the description of
physical processes that make it impossible to recover from it the type of
description we have in classical electrodynamics. Hence one cannot consider
classical electrodynamics as reducing to quantum electrodynamics and being
recovered from it by some sort of limiting procedure. Quantum electrodynamics
has to be seen not as a more fundamental theory, but as an upgrade of classical
electrodynamics, which permits an extension of classical theory to the
description of phenomena that, while being related to the conceptual framework
of the classical theory, cannot be addressed from the classical theory.
