  Gravitational area laws are expected to arise as a result of ignorance of "UV
gravitational data". In AdS/CFT, the UV/IR correspondence suggests that this
data is dual to infrared physics in the CFT. Motivated by these heuristic
expectations, we define a precise framework for explaining bulk area laws (in
any dimension) by discarding IR CFT data. In (1+1) boundary dimensions, our
prescribed mechanism shows explicitly that the boundary dual to these area laws
is strong subadditivity of von Neumann entropy. Moreover, such area laws may be
of arbitrary (and mixed) signature; thus our framework gives the first entropic
explanation of mixed signature area laws (as well as area laws for certain
dynamical causal horizons). In general dimension, the framework is easily
modified to include bulk quantum corrections, thus giving rise to an infinite
family of bulk generalized second laws.
