theorem BFO.instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem BFO.instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [j12bzjgj.BFO.FiatSurface.Is x], j12bzjgj.BFO.FiatSurface.Is x
theorem BFO.instCoeDepTypeFiatSurfaceOfIs._proof_1
theorem BFO.instCoeDepTypeFiatSurfaceOfIs._proof_1: ∀ (x : Type) [j12bzjgj.BFO.FiatSurface.Is x], j12bzjgj.BFO.FiatSurface.Is x