  We argue that novel (highly nonclassical) quantum extremal surfaces play a
crucial role in reconstructing the black hole interior even for isolated,
single-sided, non-evaporating black holes (i.e. with no auxiliary reservoir).
Specifically, any code subspace where interior outgoing modes can be excited
will have a quantum extremal surface in its maximally mixed state. We argue
that as a result, reconstruction of interior outgoing modes is always
exponentially complex. Our construction provides evidence in favor of a strong
Python's lunch proposal: that nonminimal quantum extremal surfaces are the
exclusive source of exponential complexity in the holographic dictionary. We
also comment on the relevance of these quantum extremal surfaces to the
geometrization of state dependence in the typicality arguments for firewalls.
