  In an approach to quantum gravity where space-time arises from coarse
graining of fundamentally discrete structures, black hole formation and
subsequent evaporation can be described by a unitary evolution without the
problems encountered by the standard remnant scenario or the schemes where
information is assumed to come out with the radiation while evaporation
(firewalls and complementarity). The final state is purified by correlations
with the fundamental pre-geometric structures (in the sense of Wheeler) which
are available in such approaches, and, like defects in the underlying
space-time weave, can carry zero energy.
