theorem instCoeDepTypeFiatLineOfIs._proof_1
theorem instCoeDepTypeFiatLineOfIs._proof_1: ∀ (x : Type) [d4qbfhxh.FiatLine.Is x], d4qbfhxh.FiatLine.Is x
theorem instCoeDepTypeFiatLineOfIs._proof_1
theorem instCoeDepTypeFiatLineOfIs._proof_1: ∀ (x : Type) [d4qbfhxh.FiatLine.Is x], d4qbfhxh.FiatLine.Is x