theorem instCoeDepTypePersonOfIs._proof_1
theorem instCoeDepTypePersonOfIs._proof_1: ∀ (x : Type) [xxzf15qm.Person.Is x], xxzf15qm.Person.Is x
theorem instCoeDepTypePersonOfIs._proof_1
theorem instCoeDepTypePersonOfIs._proof_1: ∀ (x : Type) [xxzf15qm.Person.Is x], xxzf15qm.Person.Is x