theorem instCoeDepTypePersonOfIs._proof_1
theorem instCoeDepTypePersonOfIs._proof_1: ∀ (x : Type) [qxpdv9xr.Person.Is x], qxpdv9xr.Person.Is x
theorem instCoeDepTypePersonOfIs._proof_1
theorem instCoeDepTypePersonOfIs._proof_1: ∀ (x : Type) [qxpdv9xr.Person.Is x], qxpdv9xr.Person.Is x