theorem instCoeDepTypeMammalOfIs._proof_1
theorem instCoeDepTypeMammalOfIs._proof_1: ∀ (x : Type) [zv7tr57y.Mammal.Is x], zv7tr57y.Mammal.Is x
theorem instCoeDepTypeMammalOfIs._proof_1
theorem instCoeDepTypeMammalOfIs._proof_1: ∀ (x : Type) [zv7tr57y.Mammal.Is x], zv7tr57y.Mammal.Is x