theorem BFO.instCoeDepTypeHistoryOfIs._proof_1
theorem BFO.instCoeDepTypeHistoryOfIs._proof_1: ∀ (x : Type) [j12bzjgj.BFO.History.Is x], j12bzjgj.BFO.History.Is x
theorem BFO.instCoeDepTypeHistoryOfIs._proof_1
theorem BFO.instCoeDepTypeHistoryOfIs._proof_1: ∀ (x : Type) [j12bzjgj.BFO.History.Is x], j12bzjgj.BFO.History.Is x