theorem Dictionary.instOutcomeAtToParent
theorem Dictionary.instOutcomeAtToParent: ∀ (x t : Type) [Outcome.At x t], Occurrent.At x t
theorem Dictionary.instOutcomeAtToParent
theorem Dictionary.instOutcomeAtToParent: ∀ (x t : Type) [Outcome.At x t], Occurrent.At x t