∀ {Γ : Type u_1} {Λ : Type u_2} {σ : Type u_3} [inst : Inhabited Γ] (x : σ) (x_1 : Turing.Tape Γ) (p : Γ → σ → Bool)
  (q₁ q₂ : Turing.TM1.Stmt Γ Λ σ),
  Turing.TM1.stepAux (Turing.TM1.Stmt.branch p q₁ q₂) x x_1 =
    bif p x_1.head x then Turing.TM1.stepAux q₁ x x_1 else Turing.TM1.stepAux q₂ x x_1