apply unprovable_classical_of_exists_ClassicalValuation
α : Type u_1
inst✝¹ : DecidableEq α
p : Formula α
inst✝ : Inhabited α
⊢ ¬𝐂𝐥 ⊢! (Axioms.T (atom default)ⱽᴾ) ⋯
case h
α : Type u_1
inst✝¹ : DecidableEq α
p : Formula α
inst✝ : Inhabited α
⊢ ∃ V, ¬V ⊧ (Axioms.T (atom default)ⱽᴾ) ⋯