have l₁ : ~~f ∈ Γ := Γ.val.property.mpr ⟨BProof.mp (BProof.ax h₁) BTheorem.dni⟩
Γ : Pr
f : Form
h₁ : f ∈ ↑↑Γ
h₂ : ~f ∈ ↑↑(primeStarFunction Γ)
⊢ False
Γ : Pr
f : Form
h₁ : f ∈ ↑↑Γ
h₂ : ~f ∈ ↑↑(primeStarFunction Γ)
l₁ : ~~f ∈ Γ
⊢ False