  There is persistent and endemic confusion between the true (future) horizon
and the illusory (past) horizon of a black hole. The illusory horizon is the
redshifting surface of matter that fell into the black hole long ago. A person
who free-falls through the horizon of a black hole falls through the true
horizon, not the illusory horizon. The infaller continues to see the illusory
horizon ahead of them, all the way down to the classical singularity. The
illusory horizon is the source of Hawking radiation, for both outsiders and
infallers. The entropy of a black hole is 1/4 of the area of the illusory
horizon, for both outsiders and infallers. The illusory horizon holographically
encodes states hidden behind it, for both outsiders and infallers. The endpoint
of an infaller approaching the classical singularity is to merge their states
with the illusory horizon. The holographic boundary of the black hole is then
the union of the illusory horizon and the classical spacelike singularity. When
an infaller reaches the classical singularity, any entanglement of the infaller
with outsiders or other infallers is transferred to entanglement with the
states of the black hole, encoded on the illusory horizon. Locality holds
between an infaller and a spacelike-separated outsider or other infaller as
long as their future lightcones intersect before the singularity, but breaks
down when the future lightcones no longer intersect.
