  The central dogma of black hole physics -- which says that from the outside a
black hole can be described in terms of a quantum system with
exp$(\text{Area}/4G_N)$ states evolving unitarily -- has recently been
supported by computations indicating that the interior of the black hole is
encoded in the Hawking radiation of the exterior. In this paper, we probe
whether such a dogma for cosmological horizons has any support from similar
computations. The fact that the de Sitter bifurcation surface is a minimax
surface (instead of a maximin surface) causes problems with this interpretation
when trying to import calculations analogous to the AdS case. This suggests
anchoring extremal surfaces to the horizon itself, where we formulate a
two-sided extremization prescription and find answers consistent with general
expectations for a quantum theory of de Sitter space: vanishing total entropy,
an entropy of $A/4G_N$ when restricting to a single static patch, an entropy of
a subregion of the horizon which grows as the region size grows until an
island-like transition at half the horizon size when the entanglement wedge
becomes the entire static patch interior, and a de Sitter version of the
Hartman-Maldacena transition.
