  We address proposed alternatives to the black hole firewall. We show that
embedding the interior Hilbert space of an old black hole into the Hilbert
space of the early radiation is inconsistent, as is embedding the
semi-classical interior of an AdS black hole into any dual CFT Hilbert space.
We develop the use of large AdS black holes as a system to sharpen the firewall
argument. We also reiterate arguments that unitary non-local theories can avoid
firewalls only if the non-localities are suitably dramatic.
