  Almheiri, Marolf, Polchinski, and Sully argued that, for a consistent black
hole evaporation process, the horizon of a sufficiently old black hole should
be replaced by a "firewall" at which an infalling observer burns up, which
obviously leads to the violation of the equivalence principle. We propose that
once the infalling partner of an outgoing Hawking particle approaches a black
hole singularity, it experiences decoherence and the loss of its entanglement
with the outgoing Hawking particle. This implies we would no longer need
firewalls to avoid the black hole information paradox.
