  Pure states in quantum field theory can be represented by many-fingered
block-time wave functions, which treat time on an equal footing with space and
make the notions of "time evolution" and "state at a given time" fundamentally
irrelevant. Instead of information destruction resulting from an attempt to use
a "state at a given time" to describe semi-classical black-hole evaporation,
the full many-fingered block-time wave function of the universe conserves
information by describing the correlations of outgoing Hawking particles in the
future with ingoing Hawking particles in the past.
