  Functional choreographic programming suggests a new propositions-as-types
paradigm might be possible. In this new paradigm, communication is not modeled
linearly; instead, ownership of a piece of data is modeled as a modality, and
communication changes that modality. However, we must find an appropriate modal
logic for the other side of the propositions-as-types correspondence. This
paper argues for doxastic logics, or logics of belief. In particular,
authorization logics -- doxastic logics with explicit communication -- appear
to represent hierarchical choreographic programming. This paper introduces
hierarchical choreographic programming and presents Corps, a language for
hierarchical choreographic programming with a propositions-as-types
interpretation in authorization logic.
